Yang Liu a, Tommy T.Y. Lam b, Florence Y.L. Lai c, Mel Krajden d, Steven J. Drews e, Todd F. Hatchette f, Pieter L.A. Fraaij g, Jeroen J.A. van Kampen g, Darmaa Badarch h, Pagbajabyn Nymadawa h, Kok Keng Tee i, Hong Kai Lee j, Evelyn S.C. Koay k, Lance Jennings l, Marion Koopmans g, Julian W. Tang m, ⁎ 
a MRC Biostatistics Unit, University of Cambridge, Cambridge, UK
b School of Public Health, University of Hong Kong, Hong Kong SAR, China
c Cardiovascular Sciences, University of Leicester, Leicester, UK
d British Columbia Centre for Disease Control, Vancouver, Canada
e Canadian Blood Services, Laboratory Medicine and Pathology, University of Alberta, Edmonton, Canada
f Todd Hachette, Department of Pathology and Laboratory Medicine, Dalhousie University, Halifax, Canada
g Erasmus Medical Centre, Rotterdam, The Netherlands
h National Center of Communicable Diseases, Ministry of Health, Mongolia
i Department of Medical Microbiology, University of Malaya, Kuala Lumpur, Malaysia
j Singapore Immunology Network, Agency for Science, Technology and Research
k Molecular Diagnosis Diagnosis Unit, National University Hospital, Singapore
l Canterbury Laboratories, Christchurch, New Zealand
m Respiratory Sciences, University of Leicester, Leicester, UK