Reference:
  Author: Maja Pohar Perme and Jacques Estève and Bernard Rachet
  Title: "Analysing population-based cancer survival – settling the controversies"
  Journal: BMC Cancer
  Year: 2016
  Volume: 16
  Pages: 933
  DOI: 10.1186/s12885-016-2967-9
  PMID: 27912732
  URL: https://bmccancer.biomedcentral.com/articles/10.1186/s12885-016-2967-9
  eprint: https://bmccancer.biomedcentral.com/track/pdf/10.1186/s12885-016-2967-9
