Corresponding Author

Division of Veterinary Anatomy and Developmental Biology, Department of Veterinary Biosciences, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland

Correspondence to: Dr. Juha Laakkonen, Department of Veterinary Biosciences, Faculty of Veterinary Medicine, P.O. Box 66, 00014 University of Helsinki, Helsinki, Finland. E-mail: juha.laakkonen@helsinki.fi

Contribution: Conceptualization (lead), Data curation (lead), Formal analysis (lead), ​Investigation (lead), Methodology (lead), Project administration (lead), Resources (lead), Visualization (lead), Writing - original draft (lead), Writing - review & editing (lead)