Affiliation: | (1) MRC Epidemiology Unit (South Wales), Llandough Hospital, Penarth, Vale of Glamorgan CF64 2XW, UK, GB;(2) Endless Street General Practice, 72 Endless Street, Salisbury, Wiltshire SP1 3UH, UK Tel.: +44-1722-336441; Fax: +44-1722-410319, GB;(3) Medicines and Health Research Unit, University of Wales, Cardiff, UK, GB;(4) Department of Pharmacology, Prince of Songkla University, PO Box 3, Hat Yai, Songkla 90112, Thailand, TH |