[1] University of Groningen,Department of Epidemiology, University Medical Center Groningen
[2] Tianjin Medical University,Department of Health Statistics, School of Public Health
[3] Tianjin Medical University Cancer Institute and Hospital,Department of Epidemiology
[4] University of Groningen,Department of Surgery, University Medical Center Groningen
[5] Comprehensive Cancer Centre North-Netherlands,Department of Surgery
[6] Martiniziekenhuis,undefined