1. Institute of Comparative Medicine, University of Glasgow Veterinary School (P.J.B., P.J.O.), Glasgow, Scotland G61 1QH, United Kingdom
2. Department of Physiology, University of Turku (P.P., I.T.H.), 20520, Turku, Finland
3. Department of Human Anatomy and Genetics, University of Oxford (M.H.A., H.M.C.), Oxford OX1 3QX, United Kingdom
4. Departments of Pathology and Molecular and Cellular Biology, Baylor College of Medicine (T.R.K.), Houston, Texas 77030