title: Icons in paediatrics: Arvo Henrik Ylppö (1887-1992).
authors.affiliation: Turku, Finland.
authors.forename: Kauko
authors.initials: K
authors.lastname: Kouvalainen
mesh_terms: D005387:Finland; D049673:History, 20th Century; D010372:Pediatrics / Q000266:history*; D010678:Philately
keywords: History; Neonatal care; Neonatal health care; Neonatal intensive care; Paediatric care