Letter to the editor.
D000328:Adult; D005260:Female; D006801:Humans; D010920:Placenta; D011247:Pregnancy; D011249:Pregnancy Complications, Cardiovascular / Q000175:diagnosis*; D012711:Serum Albumin, Radio-Iodinated; D014427:Twins
D012711:Serum Albumin, Radio-Iodinated