title: Studies in non-gonococcal urethritis therapy. The long-term value of tetracycline.
mesh_terms: D002908:Chronic Disease; D002986:Clinical Trials as Topic; D006801:Humans; D007785:Lactose / Q000627:therapeutic use; D010919:Placebos; D013307:Streptomycin / Q000627:therapeutic use; D013418:Sulfamethazine / Q000627:therapeutic use; D013752:Tetracycline / Q000627:therapeutic use*; D014526:Urethritis / Q000188:drug therapy*
chemical_list: D010919:Placebos; D013418:Sulfamethazine; D013752:Tetracycline; D007785:Lactose; D013307:Streptomycin