1. Department of Internal Medicine; Pusan National University School of Medicine and Medical Research Institute; Pusan National University Hospital; Pusan Korea
2. Yonsei University College of Medicine; Seoul Korea
3. The Kyungpook National University Hospital; Daegu Korea
4. Kyung Hee University Hospital; Seoul Korea
5. The Chinese University of Hong Kong; Hong Kong China
6. Warsaw Medical University; Warsaw Poland
7. Hospital of Infectious Diseases; Warsaw Poland
8. Bristol-Myers Squibb; Shanghai China
9. Bristol-Myers Squibb; Wallingford Connecticut USA