Health care Mary Johnston Posted by Who's Who Site Administrator on July 16, 2018September 16, 2019 Most Recent Title: Clinical Psychologist Company: U. Chgo. Med. Ctr. Industry: Health Care Years in Industry: 43 Years affiliated with Marquis Who’s Who: 26 Contact Mary Johnston: Name(required) Email(required) Website Comment(required) Submit Δ Share this:TwitterFacebookLinkedInLike this:Like Loading...