1. Department of Radiology, Thien Hanh Hospital, Buon Ma Thuot, Vietnam
2. Department of Radiology, Savannakhet Medical-Diagnostic Center, Kaysone Phomvihane, Laos
3. Department of Radiology, Tam Tri Nha Trang General Hospital, Nha Trang, Vietnam
4. Division of Endocrinology, Department of Medicine, Walter Reed National Military Medical Center, Bethesda, MD, USA