Locomotor milestones and babywalkers. Potential confounding factors were not measured.
Gardner
Frances E
FE
D015986:Confounding Factors, Epidemiologic; D002658:Developmental Disabilities / Q000209:etiology*; D006801:Humans; D007223:Infant; D015370:Infant Equipment / Q000009:adverse effects*; D016138:Walking / Q000502:physiology