1. Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain.
2. Urology Division, Department of Surgery, Faculty of Medicine, McGill University, Montréal, Quebec, Canada.
3. Department of Pharmacology and Therapeutics and Faculty of Medicine, McGill University, Montréal, Quebec, Canada.
4. Department of Anatomy and Cell Biology, Faculty of Medicine, McGill University, Montréal, Quebec, Canada.