Erratum to: The need for differentiating diabetes-specific mortality from total mortality when comparing metformin with insulin regarding cancer survival
1 Department of Obstetrics and Gynecology, Renmin Hospital of Wuhan University, Wuhan University, Wuhan, China.
2 Department of Epidemiology and Biostatistics, School of Public Health, Wuhan University, Wuhan, China.
3 Department of Statistics and Public Administration, College of Management, Wuhan Institute of Technology, 206 Optical Valley Road, Wuhan, China. [email protected].