Correction to: J Otolaryngol Head Neck Surg 50, 11 (2021)

https://doi.org/10.1186/s40463-020-00488-5

Following publication of the original article [1], the authors identified an error (omitted text) in Fig. 1. The correct figure is given below and the original article has been corrected.

Fig. 1
figure 1

Flow chart of study sample