ClinicalTrials.gov record
Completed No phase listed Observational

JC Virus Antibody Study of Participants With Relapsing Forms of MS Receiving Treatment With Natalizumab

ClinicalTrials.gov ID: NCT01070836

Public ClinicalTrials.gov record NCT01070836. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.

ClinicalTrials.gov public records Last synced May 12, 2026, 7:20 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official title

JCV Antibody Program in Patients With Relapsing Multiple Sclerosis Receiving or Considering Treatment With Tysabri: STRATIFY-2

Study identification

NCT ID
NCT01070836
Recruitment status
Completed
Study type
Observational
Phase
Not listed
Lead sponsor
Biogen
Industry
Enrollment
35,895 participants

Conditions and interventions

Interventions

  • natalizumab Drug

Drug

Eligibility (public fields only)

Age range
Not listed
Sex
All
Healthy volunteers
Healthy volunteers not accepted

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date
Feb 28, 2010
Primary completion
Oct 31, 2015
Completion
Oct 31, 2015
Last update posted
Sep 28, 2016

2010 – 2015

United States locations

U.S. sites
473
U.S. states
51
U.S. cities
389
Facility City State ZIP Site status
Research Site Birmingham Alabama 35209
Research Site Birmingham Alabama 35233
Research Site Cullman Alabama 35058
Research Site Tucaloosa Alabama 35406
Research Site Anchorage Alaska 99508
Research Site Flagstaff Arizona 86001
Research Site Gilbert Arizona 85234
Research Site Phoenix Arizona 85004
Research Site Phoenix Arizona 85013
Research Site Phoenix Arizona 85018
Research Site Phoenix Arizona 85032
Research Site Scottsdale Arizona 85258
Research Site Tucson Arizona 85718
Research Site Tucson Arizona 85741
Research Site Fayetteville Arkansas 72703
Research Site Little Rock Arkansas 72205
Research Site Sherwood Arkansas 72120
Research Site Auburn California 95602
Research Site Berkeley California 94705
Research Site Carmel California 93923
Research Site Carmichael California 95608
Research Site Fountain Valley California 92708
Research Site Fresno California 93701
Research Site Fresno California 93720
Research Site Fullerton California 92835
Research Site La Jolla California 92037
Research Site Loma Linda California 92354
Research Site Los Alamitos California 90720
Research Site Los Angeles California 90033
Research Site Los Angeles California 90073
Research Site Marina del Rey California 90292
Research Site Modesto California 95355
Research Site Newport Beach California 92663
Research Site Northridge California 91328
Research Site Palo Alto California 94301
Research Site Pasadena California 91101
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Research Site Redding California 96001
Research Site Sacramento California 95816
Research Site San Diego California 82117
Research Site San Francisco California 94109
Research Site San Francisco California 94115
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Research Site Santa Barbara California 93105
Research Site St. Helena California 94574
Research Site Stanford California 94305
Research Site Stockton California 95204
Research Site Thousand Oaks California 91360
Research Site Tracy California 95376
Research Site Arvada Colorado 80002
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Research Site Basalt Colorado 81621
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Research Site Fairfield Connecticut 06824
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Research Site New Haven Connecticut 06510
Research Site New London Connecticut 06320
Research Site Norwich Connecticut 06360
Research Site Dover Delaware 19901
Research Site Newark Delaware 19713
Research Site Washington D.C. District of Columbia 20007
Research Site Washington D.C. District of Columbia 20037
Research Site Bradenton Florida 34205
Research Site Clearwater Florida 33756
Research Site Fort Lauderdale Florida 33308
Research Site Fort Walton Beach Florida 32547
Research Site Gainesville Florida 32607
Research Site Hollywood Florida 33021
Research Site Jacksonville Florida 32209
Research Site Jacksonville Beach Florida 32250
Research Site Lighthouse PT Florida 33064
Research Site Maitland Florida 32751
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Research Site Miami Florida 33133
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Research Site Orange Park Florida 32073
Research Site Orlando Florida 32806
Research Site Ormond Beach Florida 32174
Research Site Palm Bay Florida 32905
Research Site Palm Beach Gardens Florida 33410
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Research Site Ponte Vedra Beach Florida 32082
Research Site Port Charlotte Florida 33952
Research Site Sarasota Florida 34239
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Research Site St. Petersburg Florida 33705
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Research Site Sunrise Florida 33351
Research Site Tallahassee Florida 32308
Research Site Tampa Florida 33609
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Research Site Vero Beach Florida 32960
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Research Site Winter Park Florida 32792
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Research Site Ann Arbor Michigan 48109
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Research Site Kansas City Missouri 64111
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Research Site West Seneca New York 14224
Research Site White Plains New York 10604
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Research Site Woodmere New York 11598
Research Site Advance North Carolina 27006
Research Site Asheville North Carolina 28806
Research Site Boone North Carolina 28607
Research Site Chapel Hill North Carolina 27599
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Research Site Durham North Carolina 37710
Research Site Greensboro North Carolina 27405
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Research Site Mooresville North Carolina 28117
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Research Site Centreville Virginia 20120
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Research Site Christiansburg Virginia 24073
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Research Site Cheyenne Wyoming 82001

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

Non-U.S. locations

This page focuses on the U.S. directory. The official record also lists 5 non-U.S. sites.

About this trial record page

What this page shows
Public field values for ClinicalTrials.gov record NCT01070836, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do
No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from
Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh
Last update posted Sep 28, 2016 · Synced May 12, 2026

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