Mary Rensel, M.D.Mary Rensel, M.D., is an assistant professor of neurology at the Cleveland Clinic Lerner College of Medicine, and director of wellness at Cleveland Clinic's Mellen Center for MS Treatment and Research. Latest Articles by Mary Rensel, M.D.Multiple SclerosisAsk The Expert: Mary Rensel, M.D.What recent MS milestones have been particularly helpful for patient care?