- Conditions
- Lung Non-Squamous Non-Small Cell Carcinoma, Radiation-Induced Pneumonitis, Stage II Lung Non-Small Cell Cancer AJCC v7, Stage IIA Lung Non-Small Cell Carcinoma AJCC v7, Stage IIB Lung Non-Small Cell Carcinoma AJCC v7, Stage III Lung Non-Small Cell Cancer AJCC v7, Stage IIIA Lung Non-Small Cell Cancer AJCC v7, Stage IIIB Lung Non-Small Cell Cancer AJCC v7, Stage IV Lung Non-Small Cell Cancer AJCC v7
- Interventions
- Durvalumab, Nintedanib, Placebo, Quality-of-Life Assessment
- Biological · Drug · Other + 1 more
- Lead sponsor
- Roswell Park Cancer Institute
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 8 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2015 – 2019
- U.S. locations
- 1
- States / cities
- Buffalo, New York
Search Results
Search by objective public record fields.
Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results come from ClinicalTrials.gov. When the live registry is unavailable, a clearly labeled stored copy may be shown.
These results were retrieved from the live ClinicalTrials.gov registry. Filters and sort order apply to this result list.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Showing 25–41
of 41
matching trials from the live ClinicalTrials.gov search.
- Conditions
- Stage II Non-Small Cell Lung Cancer AJCC v7, Stage IIA Non-Small Cell Lung Carcinoma AJCC v7, Stage IIB Non-Small Cell Lung Carcinoma AJCC v7, Stage III Non-Small Cell Lung Cancer AJCC v7, Stage IIIA Non-Small Cell Lung Cancer AJCC v7, Stage IIIB Non-Small Cell Lung Cancer AJCC v7
- Interventions
- Carboplatin, Cisplatin, Durvalumab, Etoposide, Paclitaxel, Pemetrexed Disodium, Photon Beam Radiation Therapy, Proton Beam Radiation Therapy, Quality-of-Life Assessment, Questionnaire Administration
- Drug · Biological · Radiation + 1 more
- Lead sponsor
- Radiation Therapy Oncology Group
- Network
- Eligibility
- 18 Years and older
- Enrollment
- 330 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2014 – 2028
- U.S. locations
- 30
- States / cities
- Jacksonville, Florida • Warrenville, Illinois • Baltimore, Maryland + 23 more
- Conditions
- Malignant Female Reproductive System Neoplasm, Stage 0 Lung Cancer AJCC v8, Stage I Lung Cancer AJCC v8, Stage IA1 Lung Cancer AJCC v8, Stage IA2 Lung Cancer AJCC v8, Stage IA3 Lung Cancer AJCC v8, Stage IB Lung Cancer AJCC v8, Stage II Lung Cancer AJCC v8, Stage IIA Lung Cancer AJCC v8, Stage IIB Lung Cancer AJCC v8, Stage III Lung Cancer AJCC v8, Stage IIIA Lung Cancer AJCC v8, Stage IIIB Lung Cancer AJCC v8, Stage IIIC Lung Cancer AJCC v8, Stage IV Lung Cancer AJCC v8, Stage IVA Lung Cancer AJCC v8, Stage IVB Lung Cancer AJCC v8
- Interventions
- Educational Intervention, Quality-of-Life Assessment, Questionnaire Administration
- Other
- Lead sponsor
- City of Hope Medical Center
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 48 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2020 – 2022
- U.S. locations
- 1
- States / cities
- Duarte, California
- Conditions
- Anatomic Stage I Breast Cancer AJCC v8, Anatomic Stage IA Breast Cancer AJCC v8, Anatomic Stage IB Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage IIA Breast Cancer AJCC v8, Anatomic Stage IIB Breast Cancer AJCC v8, Anatomic Stage III Breast Cancer AJCC v8, Anatomic Stage IIIA Breast Cancer AJCC v8, Anatomic Stage IIIB Breast Cancer AJCC v8, Anatomic Stage IIIC Breast Cancer AJCC v8, Lung Non-Small Cell Carcinoma, Prognostic Stage I Breast Cancer AJCC v8, Prognostic Stage IA Breast Cancer AJCC v8, Prognostic Stage IB Breast Cancer AJCC v8, Prognostic Stage II Breast Cancer AJCC v8, Prognostic Stage IIA Breast Cancer AJCC v8, Prognostic Stage IIB Breast Cancer AJCC v8, Prognostic Stage III Breast Cancer AJCC v8, Prognostic Stage IIIA Breast Cancer AJCC v8, Prognostic Stage IIIB Breast Cancer AJCC v8, Prognostic Stage IIIC Breast Cancer AJCC v8, Stage I Lung Cancer AJCC v8, Stage IA1 Lung Cancer AJCC v8, Stage IA2 Lung Cancer AJCC v8, Stage IA3 Lung Cancer AJCC v8, Stage IB Lung Cancer AJCC v8, Stage II Lung Cancer AJCC v8, Stage IIA Lung Cancer AJCC v8, Stage IIB Lung Cancer AJCC v8, Stage III Lung Cancer AJCC v8, Stage IIIA Lung Cancer AJCC v8, Stage IIIB Lung Cancer AJCC v8, Stage IIIC Lung Cancer AJCC v8
- Interventions
- Cognitive Behavior Therapy, Interview, Quality-of-Life Assessment, Questionnaire Administration
- Behavioral · Other
- Lead sponsor
- Jonsson Comprehensive Cancer Center
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 5 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2021 – 2023
- U.S. locations
- 1
- States / cities
- Los Angeles, California
- Conditions
- Stage I Non-Small Cell Lung Cancer AJCC v7, Stage IA Non-Small Cell Lung Carcinoma AJCC v7, Stage IB Non-Small Cell Lung Carcinoma AJCC v7, Stage II Non-Small Cell Lung Cancer AJCC v7, Stage IIA Non-Small Cell Lung Carcinoma AJCC v7, Stage IIB Non-Small Cell Lung Carcinoma AJCC v7, Stage IIIA Non-Small Cell Lung Cancer AJCC v7
- Interventions
- Laboratory Biomarker Analysis, Quality-of-Life Assessment, Stereotactic Body Radiation Therapy, Thoracic Surgical Procedure
- Other · Drug · Procedure
- Lead sponsor
- Roswell Park Cancer Institute
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 20 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2017 – 2025
- U.S. locations
- 1
- States / cities
- Buffalo, New York
- Conditions
- Lung Non-Small Cell Carcinoma, Stage I Lung Cancer AJCC v8, Stage IA1 Lung Cancer AJCC v8, Stage IA2 Lung Cancer AJCC v8, Stage IA3 Lung Cancer AJCC v8, Stage IB Lung Cancer AJCC v8, Stage II Lung Cancer AJCC v8, Stage IIA Lung Cancer AJCC v8, Stage IIB Lung Cancer AJCC v8
- Interventions
- Pembrolizumab, Quality-of-Life Assessment, Computed Tomography, Biospecimen Collection
- Biological · Other · Procedure
- Lead sponsor
- M.D. Anderson Cancer Center
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 45 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2018 – 2026
- U.S. locations
- 2
- States / cities
- New York, New York • Houston, Texas
- Conditions
- Locally Advanced Lung Non-Small Cell Carcinoma, Stage II Lung Cancer AJCC v8, Stage IIA Lung Cancer AJCC v8, Stage IIB Lung Cancer AJCC v8, Stage III Lung Cancer AJCC v8, Stage IIIA Lung Cancer AJCC v8, Stage IIIB Lung Cancer AJCC v8, Stage IIIC Lung Cancer AJCC v8, Unresectable Lung Non-Small Cell Carcinoma
- Interventions
- Carboplatin, Durvalumab, Paclitaxel, Papaverine, Radiation Therapy, Pemetrexed, Hypofractionated Radiation Therapy, Magnetic Resonance Imaging, Positron Emission Tomography, Computed Tomography, Magnetic Resonance Imaging of the Brain with and without Contrast, Biospecimen Collection
- Drug · Biological · Radiation + 1 more
- Lead sponsor
- Ohio State University Comprehensive Cancer Center
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 28 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2021 – 2026
- U.S. locations
- 2
- States / cities
- Duarte, California • Columbus, Ohio
- Conditions
- Anatomic Stage I Breast Cancer AJCC v8, Anatomic Stage IA Breast Cancer AJCC v8, Anatomic Stage IB Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage IIA Breast Cancer AJCC v8, Anatomic Stage IIB Breast Cancer AJCC v8, Anatomic Stage III Breast Cancer AJCC v8, Anatomic Stage IIIA Breast Cancer AJCC v8, Anatomic Stage IIIB Breast Cancer AJCC v8, Anatomic Stage IIIC Breast Cancer AJCC v8, Lung Non-Small Cell Carcinoma, Prognostic Stage I Breast Cancer AJCC v8, Prognostic Stage IA Breast Cancer AJCC v8, Prognostic Stage IB Breast Cancer AJCC v8, Prognostic Stage II Breast Cancer AJCC v8, Prognostic Stage IIA Breast Cancer AJCC v8, Prognostic Stage IIB Breast Cancer AJCC v8, Prognostic Stage III Breast Cancer AJCC v8, Prognostic Stage IIIA Breast Cancer AJCC v8, Prognostic Stage IIIB Breast Cancer AJCC v8, Prognostic Stage IIIC Breast Cancer AJCC v8, Stage I Lung Cancer AJCC v8, Stage I Ovarian Cancer AJCC v8, Stage IA Ovarian Cancer AJCC v8, Stage IA1 Lung Cancer AJCC v8, Stage IA2 Lung Cancer AJCC v8, Stage IA3 Lung Cancer AJCC v8, Stage IB Lung Cancer AJCC v8, Stage IB Ovarian Cancer AJCC v8, Stage IC Ovarian Cancer AJCC v8, Stage II Lung Cancer AJCC v8, Stage II Ovarian Cancer AJCC v8, Stage IIA Lung Cancer AJCC v8, Stage IIA Ovarian Cancer AJCC v8, Stage IIB Lung Cancer AJCC v8, Stage IIB Ovarian Cancer AJCC v8, Stage III Lung Cancer AJCC v8, Stage III Ovarian Cancer AJCC v8, Stage IIIA Lung Cancer AJCC v8, Stage IIIA Ovarian Cancer AJCC v8, Stage IIIA1 Ovarian Cancer AJCC v8, Stage IIIA2 Ovarian Cancer AJCC v8, Stage IIIB Lung Cancer AJCC v8, Stage IIIB Ovarian Cancer AJCC v8, Stage IIIC Lung Cancer AJCC v8, Stage IIIC Ovarian Cancer AJCC v8
- Interventions
- Chemotherapy, Functional Assessment, Questionnaire Administration
- Drug · Other
- Lead sponsor
- SWOG Cancer Research Network
- Network
- Eligibility
- 18 Years and older
- Enrollment
- 1,336 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2019 – 2027
- U.S. locations
- 166
- States / cities
- Antioch, California • Dublin, California • Fremont, California + 132 more
- Conditions
- Clinical Stage 0 Cutaneous Melanoma AJCC v8, Clinical Stage I Cutaneous Melanoma AJCC v8, Clinical Stage IA Cutaneous Melanoma AJCC v8, Clinical Stage IB Cutaneous Melanoma AJCC v8, Clinical Stage II Cutaneous Melanoma AJCC v8, Clinical Stage IIA Cutaneous Melanoma AJCC v8, Clinical Stage IIB Cutaneous Melanoma AJCC v8, Clinical Stage IIC Cutaneous Melanoma AJCC v8, Clinical Stage III Cutaneous Melanoma AJCC v8, Clinical Stage IV Cutaneous Melanoma AJCC v8, Colitis, Lung Non-Small Cell Carcinoma, Malignant Genitourinary System Neoplasm, Malignant Solid Neoplasm, Pathologic Stage 0 Cutaneous Melanoma AJCC v8, Pathologic Stage I Cutaneous Melanoma AJCC v8, Pathologic Stage IA Cutaneous Melanoma AJCC v8, Pathologic Stage IB Cutaneous Melanoma AJCC v8, Pathologic Stage II Cutaneous Melanoma AJCC v8, Pathologic Stage IIA Cutaneous Melanoma AJCC v8, Pathologic Stage IIB Cutaneous Melanoma AJCC v8, Pathologic Stage IIC Cutaneous Melanoma AJCC v8, Pathologic Stage III Cutaneous Melanoma AJCC v8, Pathologic Stage IIIA Cutaneous Melanoma AJCC v8, Pathologic Stage IIIB Cutaneous Melanoma AJCC v8, Pathologic Stage IIIC Cutaneous Melanoma AJCC v8, Pathologic Stage IIID Cutaneous Melanoma AJCC v8, Pathologic Stage IV Cutaneous Melanoma AJCC v8, Stage 0 Lung Cancer AJCC v8, Stage I Lung Cancer AJCC v8, Stage IA1 Lung Cancer AJCC v8, Stage IA2 Lung Cancer AJCC v8, Stage IA3 Lung Cancer AJCC v8, Stage IB Lung Cancer AJCC v8, Stage II Lung Cancer AJCC v8, Stage IIA Lung Cancer AJCC v8, Stage IIB Lung Cancer AJCC v8, Stage III Lung Cancer AJCC v8, Stage IIIA Lung Cancer AJCC v8, Stage IIIB Lung Cancer AJCC v8, Stage IIIC Lung Cancer AJCC v8, Stage IV Lung Cancer AJCC v8, Stage IVA Lung Cancer AJCC v8, Stage IVB Lung Cancer AJCC v8
- Interventions
- Best Practice, Biospecimen Collection, Endoscopic Procedure, Fecal Microbiota Transplantation, Infliximab, Laboratory Biomarker Analysis, Prednisone, Vedolizumab
- Other · Procedure · Biological + 1 more
- Lead sponsor
- M.D. Anderson Cancer Center
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 800 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2021 – 2026
- U.S. locations
- 1
- States / cities
- Houston, Texas
- Conditions
- Lung Non-Small Cell Carcinoma, Metastatic Colorectal Carcinoma, Metastatic Sarcoma, Stage I Lung Cancer AJCC v8, Stage IA1 Lung Cancer AJCC v8, Stage IA2 Lung Cancer AJCC v8, Stage IA3 Lung Cancer AJCC v8, Stage IB Lung Cancer AJCC v8, Stage II Lung Cancer AJCC v8, Stage IIA Lung Cancer AJCC v8, Stage IIB Lung Cancer AJCC v8, Stage III Lung Cancer AJCC v8, Stage IIIA Lung Cancer AJCC v8, Stage IIIB Lung Cancer AJCC v8, Stage IIIC Lung Cancer AJCC v8, Stage IV Colorectal Cancer AJCC v8, Stage IV Lung Cancer AJCC v8, Stage IVA Colorectal Cancer AJCC v8, Stage IVA Lung Cancer AJCC v8, Stage IVB Colorectal Cancer AJCC v8, Stage IVB Lung Cancer AJCC v8, Stage IVC Colorectal Cancer AJCC v8
- Interventions
- Computed Tomography with Contrast, Microwave Ablation, Questionnaire Administration, Wedge Excision
- Procedure · Other
- Lead sponsor
- M.D. Anderson Cancer Center
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 74 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2019 – 2028
- U.S. locations
- 1
- States / cities
- Houston, Texas
- Conditions
- Recurrent Lung Non-Small Cell Carcinoma, Stage I Lung Cancer AJCC v8, Stage IA1 Lung Cancer AJCC v8, Stage IA2 Lung Cancer AJCC v8, Stage IA3 Lung Cancer AJCC v8, Stage IB Lung Cancer AJCC v8, Stage II Lung Cancer AJCC v8, Stage IIA Lung Cancer AJCC v8, Stage IIB Lung Cancer AJCC v8, Stage III Lung Cancer AJCC v8, Stage IIIA Lung Cancer AJCC v8, Stage IIIB Lung Cancer AJCC v8, Stage IIIC Lung Cancer AJCC v8, Unresectable Lung Non-Small Cell Carcinoma
- Interventions
- Hafnium Oxide-containing Nanoparticles NBTXR3, Radiation Therapy
- Other · Radiation
- Lead sponsor
- M.D. Anderson Cancer Center
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 34 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2021 – 2028
- U.S. locations
- 1
- States / cities
- Houston, Texas
- Conditions
- Extensive Stage Lung Small Cell Carcinoma, Limited Stage Lung Small Cell Carcinoma, Stage I Lung Cancer AJCC v8, Stage IA1 Lung Cancer AJCC v8, Stage IA2 Lung Cancer AJCC v8, Stage IA3 Lung Cancer AJCC v8, Stage IB Lung Cancer AJCC v8, Stage II Lung Cancer AJCC v8, Stage IIA Lung Cancer AJCC v8, Stage IIB Lung Cancer AJCC v8, Stage III Lung Cancer AJCC v8, Stage IIIA Lung Cancer AJCC v8, Stage IIIB Lung Cancer AJCC v8, Stage IIIC Lung Cancer AJCC v8, Stage IV Lung Cancer AJCC v8, Stage IVA Lung Cancer AJCC v8, Stage IVB Lung Cancer AJCC v8
- Interventions
- Questionnaire Administration, Tumor Treating Fields Therapy
- Other · Device
- Lead sponsor
- OHSU Knight Cancer Institute
- Other
- Eligibility
- 22 Years and older
- Enrollment
- 3 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2019 – 2022
- U.S. locations
- 2
- States / cities
- Phoenix, Arizona • Portland, Oregon
- Conditions
- Lung Non-Small Cell Carcinoma, Stage II Lung Cancer AJCC v8, Stage IIA Lung Cancer AJCC v8, Stage IIB Lung Cancer AJCC v8, Stage III Lung Cancer AJCC v8, Stage IIIA Lung Cancer AJCC v8, Stage IIIB Lung Cancer AJCC v8, Stage IIIC Lung Cancer AJCC v8, Stage IV Lung Cancer AJCC v8, Stage IVA Lung Cancer AJCC v8, Stage IVB Lung Cancer AJCC v8
- Interventions
- Atezolizumab and Recombinant Human Hyaluronidase, Survey Administration
- Biological · Other
- Lead sponsor
- University of Southern California
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 5 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2022 – 2027
- U.S. locations
- 1
- States / cities
- Los Angeles, California
- Conditions
- Caregiver, Stage I Lung Cancer AJCC v7, Stage IA Lung Cancer AJCC v7, Stage IB Lung Cancer AJCC v7, Stage II Lung Cancer AJCC v7, Stage IIA Lung Cancer AJCC v7, Stage IIB Lung Cancer AJCC v7, Stage III Lung Cancer AJCC v7, Stage IIIA Lung Cancer AJCC v7, Stage IIIB Lung Cancer AJCC v7
- Interventions
- Informational Intervention, Media Intervention
- Other
- Lead sponsor
- City of Hope Medical Center
- Other
- Eligibility
- 21 Years and older
- Enrollment
- 380 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2018 – 2026
- U.S. locations
- 1
- States / cities
- Duarte, California
- Conditions
- Head and Neck Squamous Cell Carcinoma, Lung Non-Small Cell Carcinoma, Stage I Cutaneous Squamous Cell Carcinoma of the Head and Neck AJCC v8, Stage I Lung Cancer AJCC v8, Stage IA1 Lung Cancer AJCC v8, Stage IA2 Lung Cancer AJCC v8, Stage IA3 Lung Cancer AJCC v8, Stage IB Lung Cancer AJCC v8, Stage II Cutaneous Squamous Cell Carcinoma of the Head and Neck AJCC v8, Stage II Lung Cancer AJCC v8, Stage IIA Lung Cancer AJCC v8, Stage IIB Lung Cancer AJCC v8, Stage III Cutaneous Squamous Cell Carcinoma of the Head and Neck AJCC v8, Stage III Lung Cancer AJCC v8, Stage IIIA Lung Cancer AJCC v8, Stage IIIB Lung Cancer AJCC v8, Stage IIIC Lung Cancer AJCC v8, Stage IV Cutaneous Squamous Cell Carcinoma of the Head and Neck AJCC v8
- Interventions
- Best Practice, Nicotine Replacement, Quality-of-Life Assessment, Questionnaire Administration
- Other · Drug
- Lead sponsor
- Ohio State University Comprehensive Cancer Center
- Other
- Eligibility
- 21 Years and older
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2024
- U.S. locations
- 1
- States / cities
- Columbus, Ohio
- Conditions
- Locally Advanced Lung Non-Small Cell Carcinoma, Metastatic Lung Non-Small Cell Carcinoma, Stage II Lung Cancer AJCC v8, Stage IIA Lung Cancer AJCC v8, Stage IIB Lung Cancer AJCC v8, Stage III Lung Cancer AJCC v8, Stage IIIA Lung Cancer AJCC v8, Stage IIIB Lung Cancer AJCC v8, Stage IIIC Lung Cancer AJCC v8, Stage IV Lung Cancer AJCC v8, Stage IVA Lung Cancer AJCC v8, Stage IVB Lung Cancer AJCC v8, Unresectable Lung Non-Small Cell Carcinoma
- Interventions
- Computed Tomography, Contrast Agent
- Procedure · Other
- Lead sponsor
- Rutgers, The State University of New Jersey
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 34 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- 2021 – 2027
- U.S. locations
- 2
- States / cities
- New Brunswick, New Jersey
- Conditions
- Esophageal Carcinoma, Lung Non-Small Cell Carcinoma, Stage I Lung Cancer AJCC v8, Stage IA1 Lung Cancer AJCC v8, Stage IA2 Lung Cancer AJCC v8, Stage IA3 Lung Cancer AJCC v8, Stage IB Lung Cancer AJCC v8, Stage II Lung Cancer AJCC v8, Stage IIA Lung Cancer AJCC v8, Stage IIB Lung Cancer AJCC v8, Stage III Lung Cancer AJCC v8, Stage IIIA Lung Cancer AJCC v8, Stage IIIB Lung Cancer AJCC v8, Stage IIIC Lung Cancer AJCC v8, Stage IV Lung Cancer AJCC v8, Stage IVA Lung Cancer AJCC v8, Stage IVB Lung Cancer AJCC v8
- Interventions
- Educational Intervention, Quality-of-Life Assessment, Questionnaire Administration, Yoga
- Other · Procedure
- Lead sponsor
- M.D. Anderson Cancer Center
- Other
- Eligibility
- 18 Years and older
- Enrollment
- 400 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2018 – 2027
- U.S. locations
- 1
- States / cities
- Houston, Texas