Michael O'Sullivan, M.D., a former member of the Mayo Clinic Board of Governors, CEO of Mayo Clinic in Arizona, and the founding medical director of Mayo Medical Laboratories (now Mayo
Dr. Michael O'Sullivan, Mayo Clinic Health System founder, trailblazer, dies at 88 beckershospitalreview.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from beckershospitalreview.com Daily Mail and Mail on Sunday newspapers.