Department of Obstetrics and Gynecology, Faculty of Medicine, Prince of Songkla University, Had Yai, Songkhla, Thailand
Siriraj hospital, Bangkok, Thailand
Department of Medicine, Faculty of medicine, Ramathibodi Hospital, Bangkok, Thailand
Faculty of Medicine Siriraj Hospital, Bangkoknoi, Bangkok, Thailand
Siriraj Hospital, Mahidol University, Bangkok, Bangkoknoi, Thailand
Pattraporn Ponglorpisit, Ratchathewi, Bangkok, Thailand
Department of Anesthesiology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand