Brok H A, Stroeve R J, Copper M P, Schouwenburg P F
Department of Otorhinolaryngology/Head and Neck Surgery, Academic Medical Centre, University of Amsterdam, The Netherlands.
Clin Otolaryngol Allied Sci. 1998 Aug;23(4):302-7. doi: 10.1046/j.1365-2273.1998.00167.x.