1. Department of Clinical Pathology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
2. Division of Clinical Epidemiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
3. Point-of-Care Testing Center for Teaching and Research (POCT·CTR), School of Medicine, University of California, Davis, California, USA
4. Department of Laboratory Medicine, National University Hospital, Singapore