1 Department of Obstetrics and Gynaecology, National University Hospital, Singapore; Yong Loo Lin School of Medicine, National University of Singapore, Singapore. Electronic address: pradip_dashraath@nuhs.edu.sg.
2 Department of Obstetrics and Gynaecology, National University Hospital, Singapore.
3 Department of Medicine, Division of Rheumatology, National University Hospital, Singapore.
4 Department of Medicine, Division of Respiratory and Critical Care Medicine, National University Hospital, Singapore; Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
5 Department of Pathology, National University Hospital, Singapore.
6 Department of Obstetrics and Gynaecology, National University Hospital, Singapore; Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
7 Department of Medicine, Division of Rheumatology, National University Hospital, Singapore; Yong Loo Lin School of Medicine, National University of Singapore, Singapore.