Koo Chieh Sian, Ho Khek Yu
Division of Gastroenterology and Hepatology, National University Hospital, Singapore.
Division of Gastroenterology and Hepatology, National University Hospital; Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
Endosc Ultrasound. 2020 Mar-Apr;9(2):71-75. doi: 10.4103/eus.eus_4_20.