[1] Univ Med Ctr Rotterdam, Dept Orthopaed, Erasmus MC, NL-3015 GE Rotterdam, Netherlands
[2] Univ Med Ctr Rotterdam, Dept Otorhinolaryngol, Erasmus MC, NL-3015 GE Rotterdam, Netherlands
[3] Univ Utrecht, Fac Vet Med, Dept Equine Sci, Utrecht, Netherlands