Condition : Rheumatoid Arthritis Interventions : Drug: CP-690,550; Drug: placebo Sponsor : Pfizer Not yet recruiting - verified July 2011

Condition : Osteoarthritis, Hip Intervention : Sponsors : McMaster University; DePuy Orthopaedics Not yet recruiting - verified July 2011

Condition : Rheumatoid Arthritis Interventions : Drug: CP-690,550; Drug: placebo Sponsor : Pfizer Not yet recruiting - verified July 2011

Conditions : Knee Pain Chronic; Arthritis (Hip); Arthritis (Knee); Back Pain Interventions

Conditions : Knee Pain Chronic; Arthritis (Hip); Arthritis (Knee); Back Pain Interventions

Condition : Rheumatoid Arthritis Intervention : Sponsor : Hoffmann-La Roche Recruiting - verified July 2011

Condition : Rheumatoid Arthritis Intervention : Sponsor : Hoffmann-La Roche Recruiting - verified July 2011

Conditions : Rheumatoid Arthritis; Healthy Volunteers Interventions : Drug: fostamatinib; Drug: rifampicin Sponsor : AstraZeneca Completed - verified July 2011

Condition : Rheumatoid Arthritis Intervention : Drug: abatacept Sponsors : Astellas Pharma Inc; Perseid Therapeutics LLC Active, not recruiting - verified July 2011

Condition : Rheumatoid Arthritis Intervention : Drug: abatacept Sponsors : Astellas Pharma Inc; Perseid Therapeutics LLC Active, not recruiting - verified July 2011