Received: 12 January 2020
Accepted: 27 April 2020
First Online: 13 May 2020
Ethics approval and consent to participate
: The data used for this study were collected as part of routine data recording for a commercial breeding program. Samples collected for DNA extraction were only used for the breeding program. Data recording and sample collection were conducted strictly in line with the Dutch law on the protection of animals (Gezondheids- en welzijnswet voor dieren).
: Not applicable.
: The authors declare that they have no competing interests.