The Order of St. John and its role in modern medicine.
D002662:Child Health Services; D005060:Europe; D005392:First Aid; D049670:History, 17th Century; D049671:History, 18th Century; D006761:Hospitals; D007390:International Agencies / Q000266:history*; D007918:Leprosy / Q000517:prevention & control; D012952:Societies / Q000266:history*