Guillaume (Guy) Cornelis Maria Grinwis did his residency training at the Pathobiology department of the Veterinary faculty (Utrecht University, the Netherlands) leading to board certification as specialist in veterinary pathology by the Royal Netherlands Veterinary Association (KNMvD) in 1995. His PhD thesis on health effects of some major aquatic pollutants in European flounder was published in May 2006. Currently, he is a senior veterinary pathologist at the Veterinary Pathology Diagnostic Centre (VPDC) in Utrecht and is involved in post-graduate training of residents in veterinary pathology and residents in clinical veterinary sciences (e.g. ophthalmology, internal medicine, and oncology). He has special interest in ocular pathology and liver pathology, and participates in (inter)national research projects on regenerative medicine and stem cells in the fields of liver disease, pathologies of the intervertebral disc, and tumors of endocrine organs.