title: Lumbo-sacral malformations and spina bifida occulta in a group of proto-historic Modoc Indians.
mesh_terms: D000293:Adolescent; D002648:Child; D006801:Humans; D007198:Indians, North American; D008159:Lumbar Vertebrae / Q000002:abnormalities*; D008297:Male; D010164:Paleopathology; D012447:Sacrum / Q000002:abnormalities*; D016135:Spinal Dysraphism / Q000453:epidemiology*