[1] Univ Newcastle, Ctr Clin Epidemiol & Biostat, Newcastle, NSW 2308, Australia
[2] Shanghai Med Univ, Clin Epidemiol Unit, Shanghai 200032, Peoples R China
[3] W China Univ Med Sci, Dept Clin Epidemiol, Chengdu 610041, Peoples R China
[4] Mahidol Univ, Siriraj Hosp, Fac Med, Dept Pharmacol, Bangkok 10700, Thailand
[5] Govt Med Coll, Nagpur, Maharashtra, India
[6] Suez Canal Univ, Clin Epidemiol Unit, Suez Canal, Ismalia, Egypt
[7] Univ Nairobi, Fac Med, Nairobi, Kenya