1. Clinic of Reproductive Medicine, Vetsuisse Faculty Zurich, Winterthurerstrasse 260, 8057 Zurich, Switzerland
2. Institute of Veterinary Anatomy, Vetsuisse Faculty Zurich, Winterthurerstrasse 260, 8057 Zurich, Switzerland
3. Tierarztpraxis KLC, 1562 Corcelles-près-Payerne, Switzerland