[Embryological considerations of the impaired part (external auditory canal and ossicles) in congenital malformations of the sound conducting apparatus. 1. Statistical observations on malformations of the middle ear on the basis of operative findings].
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004432:Ear, Middle / Q000002:abnormalities* / Q000601:surgery; D005260:Female; D006801:Humans; D008297:Male