S J Gray T L Ward L L Southern D R Ingram

roxana mansour-ghanaei pediatric infections research center, mofid children hospital, shahid beheshti university of medical sciences, tehran, iran. maziar moradi-lakeh preventive medicine and public health research center, department of community medicine, iran university of medical sciences, tehran, iran. sareh shakerian school of medical education, shahid beheshti university of medical sciences and health services, tehran, iran. abdollah karimi pediatric infections research center, mofid children hospital, shahid beheshti university of medical sciences, tehran, iran. shooka esmaeeli tehran university of medical sciences, iranian research center for hiv/aids (ircha), iranian institute for reduction of high-risk behaviors, tehran, iran. farhad shokraneh cochrane schizophrenia group, the institute of mental health, a partnership between the university of nottingham and notting-hamshire healthcare nhs trust, uk.