Thomas Davidson, Ph.D., has been appointed director of toxicology and pharmacology, Ricerca. Dr. Davidson is responsible for the company’s study directors, peer review of toxicological reports and ensuring on-time delivery of these reports.     Prior to joining the company, Dr. Davidson was the director of toxicology at Enzon Pharmaceuticals, Inc. in Piscataway, NJ.  Prior to Enzon, he served as executive director of drug safety evaluation at Bristol-Myers Squibb in New Brunswick, NJ. ...