title: Erratum to: The need for differentiating diabetes-specific mortality from total mortality when comparing metformin with insulin regarding cancer survival.
authors.affiliation: Department of Obstetrics and Gynecology, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, China.|Department of Epidemiology and Biostatistics, School of Public Health, Wuhan University, Wuhan, China.
authors.forename: Min
authors.initials: M
authors.lastname: Wei
authors.affiliation: Department of Statistics and Public Administration, College of Management, Wuhan Institute of Technology, 206 Optical Valley Road, Wuhan, China. lyu429@163.com.
authors.forename: Yu
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Wuhan University, Wuhan, China.
authors.forename: Chunhong
authors.initials: C
authors.lastname: Wang
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Wuhan University, Wuhan, China.
authors.forename: Chuanhua
authors.initials: C
authors.lastname: Yu
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Wuhan University, Wuhan, China.
authors.forename: Dejia
authors.initials: D
authors.lastname: Li
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Wuhan University, Wuhan, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhou
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Wuhan University, Wuhan, China.
authors.forename: Zhi-Jiang
authors.initials: ZJ
authors.lastname: Zhang