Acknowledgements
Supported by Astrid and David Hagelén Foundation, Swedish Research Council, Swedish Diabetes Foundation, AGFOND, Konrad and Helfrid Johansson Foundation, VINNMER and VINNOVA. The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.
Declaration of interest: RL and BH are also members of another international research collaboration that has received a grant from Sanofi-Aventis to study the association between insulin glargine and cancer.