100 years of Pennsylvania dermatology: Part 2.
D000047:Academies and Institutes / Q000266:history; D003880:Dermatology / Q000266:history*; D004501:Education, Medical / Q000266:history; D049672:History, 19th Century; D049673:History, 20th Century; D006782:Hospitals, Special / Q000266:history; D010414:Pennsylvania; D012955:Societies, Medical / Q000266:history*