Unit of Biostatistics, Institute of Environmental Medicine, Karolinska Institutet, Stockholm 17177, Sweden. xin.fang@ki.se. Department of Health Statistics, Second Military Medical University, Shanghai 200433, China. he_dong1102@126.com. Department of Cardiology, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai 200003, China. happyxiaoant@126.com. Department of Cardiology, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai 200003, China. chunliangliang@hotmail.com. Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China. Fan@pumch.cn. Faculty of Public Health, Hedmark University of Applied Sciences, Elverum 2411, Norway. jaol-aas@online.no. Innlandet Hospital Trust, Kongsvinger Hospital Division, Kongsvinger 2226, Norway. jaol-aas@online.no. Department of Health Statistics, Second Military Medical University, Shanghai 200433, China. hejia63@yeah.net. Clinical Epidemiology and Biostatistics, School of Medical Sciences, Örebro University, Örebro 70182, Sweden. scott.montgomery@regionorebrolan.se. Clinical Epidemiology Unit, Karolinska University Hospital, Karolinska Institutet, Stockholm 17177, Sweden. scott.montgomery@regionorebrolan.se. Department of Epidemiology and Public Health, University College London, London WC1E 6BT, UK. scott.montgomery@regionorebrolan.se. Unit of Biostatistics, Institute of Environmental Medicine, Karolinska Institutet, Stockholm 17177, Sweden. yang.cao@ki.se. Clinical Epidemiology and Biostatistics, School of Medical Sciences, Örebro University, Örebro 70182, Sweden. yang.cao@ki.se.