
Calvin Koh, MBBS FRCP, FASGE
@drcalvinkoh
GI physician Singapore. Endoscopy, cancer screening. Tweets my own opinion.
ID: 1295960807360983040
https://www.gastroenterology-group.com 19-08-2020 05:48:38
926 Tweet
753 Followers
595 Following
@drcalvinkoh
GI physician Singapore. Endoscopy, cancer screening. Tweets my own opinion.
ID: 1295960807360983040
https://www.gastroenterology-group.com 19-08-2020 05:48:38
926 Tweet
753 Followers
595 Following