Clinical trial in general practice?
D000328:Adult; D002986:Clinical Trials as Topic / Q000379:methods*; D004311:Double-Blind Method; D004318:Doxycycline / Q000009:adverse effects / Q000627:therapeutic use; D005194:Family Practice; D006801:Humans; D011897:Random Allocation; D012141:Respiratory Tract Infections / Q000188:drug therapy
D004318:Doxycycline