title: Letter: Blood urea levels in artificially-fed infants.
mesh_terms: D000818:Animals; D001798:Blood Proteins / Q000032:analysis; D005260:Female; D006801:Humans; D007223:Infant; D007227:Infant Nutritional Physiological Phenomena; D007231:Infant, Newborn; D008297:Male; D008892:Milk; D012964:Sodium / Q000097:blood; D014508:Urea / Q000097:blood*
chemical_list: D001798:Blood Proteins; D014508:Urea; D012964:Sodium