About the Authors

Gert Jan Boender, Thomas J Hagenaars, Gonnie Nodelijk, Mart C. M de Jong, Michiel van Boven
Animal Sciences Group, Wageningen University and Research Centre, Lelystad, The Netherlands

Annemarie Bouma
Faculty of Veterinary Medicine, Department of Farm Animal Health, Utrecht University, Utrecht, The Netherlands

Armin R. W Elbers
Animal Health Service, Deventer, The Netherlands

Corresponding Author


Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

MCMdJ, GJB, MvB, and TJH conceived the ideas underlying the analyses. AB, GN, and ARWE collected the data. GJB, TJH, and MvB analyzed the data and wrote the paper. AB, GN, ARWE, and MCMdJ commented on the text.