Affiliation: | 1. Department of Biostatistics, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China;2. Department of Epidemiology and Biostatistics, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China;3. Department of Biostatistics, University of Michigan, Ann Arbor, MI 48109, USA;4. Center for Statistical Genetics, University of Michigan, Ann Arbor, MI 48109, USA |