title: [Medical security system in Bulgaria: retrospections and prospects].
authors.forename: M
authors.initials: M
authors.lastname: Apostolov
mesh_terms: D002031:Bulgaria; D049692:History, Early Modern 1451-1600; D049691:History, Medieval; D049711:History, Modern 1601-; D007341:Insurance / Q000266:history; D007348:Insurance, Health / Q000266:history*; D011634:Public Health / Q000266:history*; D012943:Social Security / Q000266:history*; D013222:State Medicine / Q000266:history*