title: Twin studies: are sequential methods useful?
mesh_terms: D002648:Child; D002675:Child, Preschool; D002986:Clinical Trials as Topic / Q000379:methods*; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D007732:Kwashiorkor / Q000178:diet therapy; D008278:Magnesium Sulfate / Q000008:administration & dosage; D011247:Pregnancy; D011897:Random Allocation; D012965:Sodium Chloride / Q000008:administration & dosage; D014427:Twins
chemical_list: D012965:Sodium Chloride; D008278:Magnesium Sulfate