1. Department of Medicine, University of Hawaii Internal Medicine Residency Program, Honolulu, Hawaii, USA
2. Ophthalmology Department, University of Washington, Seattle, Washington, USA
3. Faculty of Medicine, Thammasat University, Bangkok, Thailand
4. Faculty of Medicine, Chulalongkorn University Hospital, Bangkok, Thailand
5. Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas, USA
6. Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
7. Department of Cardiovascular Diseases, Mayo Clinic, Phoenix, Arizona, USA