title: It's a small World.
authors.forename: Markus K
authors.initials: MK
authors.lastname: Heinemann
mesh_terms: D000349:Africa / Q000453:epidemiology; D013504:Cardiovascular Surgical Procedures / Q000592:standards / Q000706:statistics & numerical data*; D005858:Germany / Q000453:epidemiology; D006801:Humans