Dr Das has a clinical interest in rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, gout, connective tissue diseases (e.g. systemic lupus erythematosus, myositis, scleroderma and Sjogren's syndrome), vasculitic disorders, some metabolic bone conditions (such as osteoporosis and Paget's disease), fibromyalgia and soft tissue rheumatic conditions.