Received: 28 November 2019
Accepted: 21 May 2020
First Online: 2 June 2020
Ethics approval and consent to participate
: The study was approved by the Royal Veterinary College Social Science Research Ethical Review Board (SSRERB) (RVC Ethics Code: 2013 0073H). Anonymity was assured and participants gave written informed consent to take part in the study.
: Not applicable.
: The authors declare that they have no competing interests.