Corrigendum to 'Factors associated with sentinel lymph node status and prognostic role of completion lymph node dissection for thick melanoma' [Eur J Surg Oncol 46 2 (2019) 263–271] (European Journal of Surgical Oncology (2020) 46(2) (263–271), (S0748798319308807), (10.1016/j.ejso.2019.09.189))