title: Letter: Cost of breast-feeding.
mesh_terms: D001942:Breast Feeding; D003365:Costs and Cost Analysis; D004044:Dietary Proteins / Q000008:administration & dosage; D005260:Female; D006801:Humans; D007223:Infant; D007774:Lactation; D009751:Nutritional Requirements; D011247:Pregnancy
chemical_list: D004044:Dietary Proteins