title: Longitudinal study of free thyroxine in low-birth-weight infants by paper disk method.
mesh_terms: D003409:Congenital Hypothyroidism; D005374:Filtration; D006801:Humans; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D008403:Mass Screening / Q000379:methods; D011863:Radioimmunoassay / Q000379:methods*; D013963:Thyroid Hormones / Q000097:blood; D013972:Thyrotropin / Q000097:blood; D013974:Thyroxine / Q000097:blood*
chemical_list: D013963:Thyroid Hormones; D013972:Thyrotropin; D013974:Thyroxine