1 National University Hospital, Singapore, Republic of Singapore.
2 Duke-NUS Medical School, Singapore, Republic of Singapore.
3 Tan Tock Seng Hospital, Singapore, Republic of Singapore.
4 Tan Tock Seng Hospital, Singapore, Republic of Singapore; National Centre for Infectious Diseases, Singapore, Republic of Singapore; Lee Kong Chian School of Medicine, Singapore, Republic of Singapore.
5 Tan Tock Seng Hospital, Singapore, Republic of Singapore; National Centre for Infectious Diseases, Singapore, Republic of Singapore; Lee Kong Chian School of Medicine, Singapore, Republic of Singapore; Yong Loo Lin School of Medicine, Singapore, Republic of Singapore.
6 Duke-NUS Medical School, Singapore, Republic of Singapore; Tan Tock Seng Hospital, Singapore, Republic of Singapore; Lee Kong Chian School of Medicine, Singapore, Republic of Singapore; Yong Loo Lin School of Medicine, Singapore, Republic of Singapore; Moorfields Eye Hospital, NHS Foundation Trust, London, United Kingdom. Electronic address: [email protected].