Clues in Perthes's disease.
D000367:Age Factors; D001846:Bone Development; D002648:Child; D002675:Child, Preschool; D005260:Female; D005272:Femur Neck / Q000098:blood supply; D006801:Humans; D007873:Legg-Calve-Perthes Disease / Q000209:etiology*; D008297:Male; D010007:Osteochondritis / Q000209:etiology*; D044469:Racial Groups; D012737:Sex Factors