PHOENIX, Aug. 12, 2011 /PRNewswire/ -- Veterinarians at the Phoenix Zoo welcomed the help of the Associate Chief of Cardiovascular Surgery at St. Joseph's Heart & Lung Institute, Dr. Brian deGuzman, to perform a delicate surgery on the oldest mandrill in the United States.

Physicians, patients and representatives from the Province and Provincial Health Services Authority gathered at a news conference at St. Paul's Hospital today to recognize the B.C.