Pressure ulcer classification: rediscovering the key observations.
D004739:England; D049673:History, 20th Century; D006801:Humans; D008486:Physician Executives / Q000266:history*; D003668:Pressure Ulcer / Q000266:history*; D012108:Research Personnel / Q000266:history*; D012958:Societies, Scientific / Q000266:history*