title: [Reply to Prof. S. Malawski's open letter].
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D005271:Femur Head Necrosis / Q000601:surgery*; D006801:Humans; D007873:Legg-Calve-Perthes Disease / Q000601:surgery*; D012306:Risk
vernacular_title: Odpowiedź na list otwarty prof. dr S. Malawskiego.