Rheumatology / Immunology / Evidence Based Medicine / Yoga / Rheumatoid Arthritis / Osteoarthritis / Humans / Fibromyalgia / Clinical Sciences / Public health systems and services research / Rheumatic diseases / Randomized Controlled Trials as Topic / Osteoarthritis / Humans / Fibromyalgia / Clinical Sciences / Public health systems and services research / Rheumatic diseases / Randomized Controlled Trials as Topic