title: Biological age of southern Chinese boys.
mesh_terms: D000365:Age Determination by Skeleton; D001846:Bone Development; D002348:Carpal Bones; D002648:Child; D002675:Child, Preschool; D006723:Hong Kong; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D010012:Osteogenesis; D012959:Socioeconomic Factors