title: 25, 50 & 75 years ago.
mesh_terms: D001706:Biopsy / Q000266:history* / Q000295:instrumentation; D014695:Cerebral Ventriculography / Q000266:history*; D004933:Esophageal Atresia / Q000266:history / Q000601:surgery; D049673:History, 20th Century; D006801:Humans; D009369:Neoplasms / Q000175:diagnosis / Q000266:history; D009493:Neurosurgery / Q000266:history; D009767:Obesity, Morbid / Q000266:history* / Q000628:therapy