title: [Bulgarian rheumatology in the twentieth century : German-Bulgarian collegiality].
authors.affiliation: Archiv der Deutschen Gesellschaft für Rheumatologie, Medizinhistorische Sammlung Gommern-Vogelsang, Am Kiefernhang 3, 39245, Gommern-Vogelsang, Deutschland, VGM.MHS@helios-kliniken.de.
authors.forename: W
authors.initials: W
authors.lastname: Keitel
authors.forename: I N
authors.initials: IN
authors.lastname: Boykinov
authors.forename: Y
authors.initials: Y
authors.lastname: Sheitanov
authors.forename: Z
authors.initials: Z
authors.lastname: Kolarow
mesh_terms: D002031:Bulgaria; D005858:Germany; D049673:History, 20th Century; D007391:International Cooperation / Q000266:history*; D012216:Rheumatic Diseases / Q000266:history*; D012219:Rheumatology / Q000266:history*