Dr. Lynnette Watkins is leaving her position as leader of Cooley Dickinson Hospital after just three years.  Watkins sent a letter to the hospital community saying she was sad to leave but is proud of what was accomplished during her leadership.  Watkins was selected following a national search that identified her due to her health care leadership experience, performance improvements and financial management.  Watkins confirmed her departure to the Gazette but said she could not comment further.