title: Possible association of herpes simplex type I reactivation with epidural morphine administration.
mesh_terms: D000767:Anesthesia, Epidural / Q000009:adverse effects*; D005260:Female; D006560:Herpes Labialis / Q000209:etiology*; D006801:Humans; D007268:Injections, Epidural / Q000009:adverse effects*; D009020:Morphine / Q000008:administration & dosage*; D011247:Pregnancy; D011446:Prospective Studies; D012008:Recurrence
chemical_list: D009020:Morphine