Wira Prihatin Siregar
* Corresponding Author Gastroentero-hepatology Division of Internal Medicine Department, Medical Faculty of University of Sumatera Utara / Haji Adam Malik General Hospital
Gontar Alamsyah Siregar Gastroentero-hepatology Division of Internal Medicine Department, Medical Faculty of University of Sumatera Utara / Haji Adam Malik General Hospital
Taufik Sungkar Gastroentero-hepatology Division of Internal Medicine Department, Medical Faculty of University of Sumatera Utara / Haji Adam Malik General Hospital