Frank A M van Balen, W Martijn Smit, Nicolaas P A Zuithoff, Theo J M Verheij
van Balen F A M, Smit W M, Zuithoff N P A, Verheij T J M.
Clinical efficacy of three common treatments in acute otitis externa in primary care: randomised controlled trial
BMJ 2003; 327 :1201
doi:10.1136/bmj.327.7425.1201