[1] Frontier Healthcare Holdings Pte Ltd, Frontier Family Med Clin, Singapore, Singapore
[2] Natl Univ Hlth Syst, Div Endocrinol, Singapore, Singapore
[3] Natl Univ Singapore, Dept Pharm, Fac Sci, Singapore 117548, Singapore
[4] Natl Univ Hlth Syst, Reg Hlth Syst Planning & Dev, Singapore, Singapore
[5] Natl Univ Singapore, Saw Swee Hock Sch Publ Hlth, Singapore 117548, Singapore