Depression Acute renal failure Anxiety disorders Arthritis Asthma -- Diagnosis Autoimmunity Breast--Cancer Cerebrovascular disease -- Research Chronic illness Cisplatin -- Dosage forms -- Testing Colonoscopy Comorbidity Constipation -- Prevention Coronary heart disease Coronary heart disease -- Treatment Depression- causes Gastrointestinal Diseases -- diagnosis HIV -- prevention & control HIV infection Health status indicators Highly active antiretroviral therapy Kidneys -- Cancer Kidneys--Diseases Knee -- Diagnosis Muslim pilgrims and pilgrimages -- Saudi Arabia--Mecca Myocardial infarction Nasopharyngeal Neoplasms -- diagnosis Nitric Oxide -- analysis Osteoarthritis Osteoarthritis -- Diagnosis Rheumatoid Sodium phosphates and treatment diagnosis