Hill J C, Prasher D K, Luxon L M
Institute of Laryngology and Otology, University College London Medical School, Royal National Throat, Nose and Ear Hospital, London, UK.
Clin Otolaryngol Allied Sci. 1997 Oct;22(5):394-402. doi: 10.1046/j.1365-2273.1997.00078.x.