[1] Natl Univ Singapore Hosp, Div Rheumatol, Dept Med, Singapore, Singapore
[2] Natl Univ Singapore Hosp, Dept Med, Singapore, Singapore
[3] Singapore Gen Hosp, Dept Gen Surg, Singapore, Singapore
[4] Natl Univ Singapore Hosp, Div Primary Care, Dept Care Integrat & Alliance, Singapore, Singapore
[5] Natl Univ Singapore Hosp, Clin Nursing Unit, Singapore, Singapore