Letter: Relief from hay fever.
D000287:Administration, Topical; D006801:Humans; D006854:Hydrocortisone / Q000008:administration & dosage / Q000627:therapeutic use*; D010577:Petrolatum / Q000627:therapeutic use*; D006255:Rhinitis, Allergic, Seasonal / Q000188:drug therapy*
D010577:Petrolatum; D006854:Hydrocortisone