P. Clarós, A. Sobolewska, M. del C. Pujol, A. Clarós-Pujol, and A. Clarós, “Long-term results of tonsillectomy in professional opera singers: a pilot study”, Int J Otorhinolaryngol Head Neck Surg, vol. 6, no. 5, pp. 815–820, Apr. 2020.