?:authorAffiliation
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[\'Medical Research Council Biostatistics Unit, School of Clinical Medicine, University of Cambridge, Cambridge, UK. Electronic address: yang.liu@mrc-bsu.cam.ac.uk.\', \'Respiratory Sciences, University of Leicester, Leicester, UK.\', \'State Key Laboratory of Emerging Infectious Diseases, School of Public Health, The University of Hong Kong, Hong Kong SAR, China. Electronic address: ttylam@hku.hk.\']
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