机构:
Univ Helsinki, Dept Otorhinolaryngol Head & Neck Surg, Helsinki, Finland
Helsinki Univ Hosp, Helsinki, Finland
Univ Helsinki, Fac Med, Res Programme Syst Oncol, Helsinki, Finland
Karolinska Inst, Dept Clin Sci, Div Ear Nose & Throat Dis, Stockholm, Sweden
Karolinska Hosp, Stockholm, SwedenHosp Torrecardenas, Vasc Surg Dept, Almeria, Spain