1Department of Community Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
2Faculty of Public Health, Chiang Mai University, Chiang Mai, Thailand
3Department of Community Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
4Epidemiology Unit, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
5College of Public Health Sciences, Chulalongkorn University, Bangkok, Thailand
6Ramathibodi School of Nursing, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
7Department of Pathology, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
8Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
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