1. Department of Laboratory Medicine, King Chulalongkorn Memorial Hospital and Chulalongkorn University
2. Department of Medicine, King Chulalongkorn Memorial Hospital
3. Department of Medicine, Rajavithi Hospital and Rangsit University
4. Department of Medicine, Maharaj Nakorn Chiang Mai Hospital, Chiang Mai University
5. Department of Medicine, Songklanagarind Hospital, Prince of Songkla University
6. Department of Medicine, Siriraj Hospital, Mahidol University
7. Department of Medicine, Thammasat Hospital, Thammasat University
8. Department of Medicine, Ramathibodi Hospital, Mahidol University
9. Department of Medicine, Srinagarind Hospital, Khon Kaen University
10. Department of Medicine, Chonburi Hospital, Ministry of Public Health
11. Department of Medicine, King Prajadhipok Memorial Hospital
12. Department of Medicine, Phramongkutklao Hospital and College of Medicine
13. Department of Medicine, Bhumibol Adulyadej Hospital
14. Department of Medicine, Chulabhorn Hospital, Chulabhorn Royal Academy
15. Department of Medicine, Charoenkrung Pracharak Hospital, Bangkok Metropolitan Administration
16. Department of Medicine, Taksin Hospital, Bangkok Metropolitan Administration
17. Department of Medicine, Vajira Hospital, Navamindradhiraj University
18. Department of Medicine, Vachira Phuket Hospital, Ministry of Public Health
19. Department of Medicine, Police General Hospital
20. Department of Medicine, King Chulalongkorn Memorial Hospital and Chulalongkorn University
21. Department of Preventive and Social Medicine, King Chulalongkorn Memorial Hospital and Chulalongkorn University