Funding for this research was provided by:
Norges Forskningsråd (230465)
Norges Teknisk-Naturvitenskapelige Universitet
Text and Data Mining valid from 2019-08-13
Received: 27 February 2019
Accepted: 25 July 2019
First Online: 13 August 2019
Ethics approval and consent to participate
: The sampling was approved by the national ethics committee for animal care and use which falls under the Norwegian Food Safety Authority (Mattilsynet; 2015/6432 and 2016/8709) and the handling of the birds were in accordance with the regulations of the Norwegian Animal Welfare Act.
: Not applicable.
: The authors declare that they have no competing interests.