Corresponding Author

Sang Heon Song

Department of Internal Medicine, Pusan National University Hospital, Busan, Korea

Biomedical Research Institute, Pusan National University Hospital, Busan, Korea

Correspondence

Sang Heon Song, MD, PhD, Department of Internal Medicine, Pusan National University Hospital, 179 Gudeok-ro, Seo-gu, Busan 49241, Republic of Korea. Tel: +82-51-240-7875, Fax: +82-51-254-3127,

Email: shsong0209@gmail.com