[1] Natl Univ Hlth Syst Singapore, Singapore, Singapore
[2] Abbott Diagnost, Chicago, IL USA
[3] Tan Tock Seng Hosp Singapore, Singapore, Singapore
[4] Singapore Gen Hosp, Singapore, Singapore
[5] Changi Gen Hosp Singapore, Singapore, Singapore
[6] Khoo Teck Puat Hosp Singapore, Singapore, Singapore
[7] Singapore Clin Res Inst, Singapore, Singapore