Received: 8 February 2020
Accepted: 31 August 2020
First Online: 7 September 2020
Ethics approval and consent to participate
: Sample collection protocols were approved by the Animal Experiment Committee of Azabu University.
: Not applicable.
: TW, DC and JC declare that they received salary support from Chondrex, Inc. The organizations which provided support in the form of salaries for the authors (TW, DC, and JC) did not play any roles in the study design, data collection and analysis, decision to publish, or preparation of this manuscript. This does not alter our adherence to Acta Veterinaria Scandinavica policies on sharing data and materials.