Lam Lawrence T M, Chua Ying Xian, Tan David H Y
National University Polyclinics, National University Health System, Pioneer Polyclinic, Ng Teng Fong General Hospital Tower A Basement 2, Singapore.
Fam Pract. 2020 Sep 5;37(4):578-579. doi: 10.1093/fampra/cmaa047.