Correspondence to: Kwong-Yue Eric Chan, MBBS, Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong SAR, China, Email

E-mail Address: [email protected]

Cardiology Division, Department of Medicine, School of Clinical Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China (K.-Y.E.C., C.-C.S.L., M.S.-Y.S., K.-C.U., C.-C.F.T., Y.-M.L., C.-K.W.)