2 Department of Medicine, James Cook University Hospital, Middlesbrough, United Kingdom.
3 National University Hospital, National University Health System, 5 Lower Kent Ridge Rd, 119074, Singapore.
4 Institute of Mental Health, Buangkok Green Medical Park, 10 Buangkok View, 539747, Singapore; Yong Loo Lin School of Medicine, National University of Singapore, 117597, Singapore.
5 Mount Elizabeth Hospital, 3 Mount Elizabeth, Singapore 228510, Singapore.