Editorial: Hemorrhoids.
D001163:Arteriovenous Anastomosis; D006484:Hemorrhoids / Q000097:blood / Q000209:etiology*; D006801:Humans; D007413:Intestinal Mucosa / Q000098:blood supply; D010100:Oxygen / Q000097:blood; D012007:Rectum / Q000098:blood supply
D010100:Oxygen