[An epidemiological study on shuffling babies at a health check-up at 18 months of age].
D002658:Developmental Disabilities / Q000453:epidemiology*; D005260:Female; D005684:Gait; D006801:Humans; D007223:Infant; D007564:Japan; D008124:Locomotion; D008297:Male; D009069:Movement Disorders / Q000453:epidemiology*