Next time you're in the hospital, thank her:
Justine Johnstone (January 31, 1895 – September 4, 1982) was an American stage and silent screen actress. She was later a pathologist and expert on syphilis. Working under her married name, Justine Wanger, she was part of the team that developed the modern intravenous drip technique
I love the way her entry describes her occupations: Stage, film actress, pathologist, scientist.