[1] Natl Univ Singapore Hosp, Dept Paediat, Tower Block Level 12,1E Kent Ridge Rd, Singapore 119228, Singapore
[2] Natl Univ Singapore, Yong Loo Lin Sch Med, Dept Paediat, Singapore, Singapore
[3] Kandang Kerbau Womens & Childrens Hosp, Dept Paediat, Singapore, Singapore
[4] Gleneagles Hosp Kuala Lumpur, Dept Med, Kuala Lumpur, Malaysia
[5] Natl Univ Hlth Syst, Natl Univ Hosp, Emergency Med Dept, Singapore, Singapore
[6] Natl Univ Singapore, Yong Loo Lin Sch Med, Dept Surg, Singapore, Singapore
[7] Tan Tock Seng Hosp, Emergency Dept, Singapore, Singapore
[8] Kandang Kerbau Womens & Childrens Hosp, Dept Obstet & Gynaecol, Singapore, Singapore