Erratum to: Eur Arch Otorhinolaryngol DOI 10.1007/s00405-008-0817-3

The e-mail addresses of Lisette van der Molen and Maya A. van Rossum unfortunately contained errors.

They should read l.vd.molen@nki.nl and M.A.van_Rossum@lumc.nl, respectively.

Moreover, a low-resolution version of Fig. 1 was included in the article, detracting from its legibility. A version of better quality is given below:

Fig. 1
figure 1

Search strategy