title: Seasonal treatment with ranitidine.
mesh_terms: D002986:Clinical Trials as Topic; D006801:Humans; D010437:Peptic Ulcer / Q000188:drug therapy*; D011897:Random Allocation; D011899:Ranitidine / Q000627:therapeutic use*; D012008:Recurrence; D012621:Seasons
chemical_list: D011899:Ranitidine