Heraa General Hospital; Rheumatology, Makkah, Saudi Arabia
King Abdulaziz University Hospital, Jeddah, Saudi Arabia
King Fahad Specialist Hospital; Oncology, Dammam, Saudi Arabia
Nemocnice Novy Jicin; Dialyzacni Stredisko, Novy Jicin, Czechia
Changhua Christian Hospital; Internal Medicine, Changhua, Taiwan
Veterans General Hospital; Internal Medicine, Kaohsiung, Taiwan
Chang Gung Medical Foundation - Linkou; Chest Dept, Taoyuan, Taiwan