TI - Systemic Therapy in Recurrent or Metastatic Squamous Cell Head and Neck Cancer AU - KILADZE, I. AU - ÖZYİĞİT, G. AU - DUBINSKY, P. AU - FILIPOVIC, N. AU - JEREMIC, B. SO - Turk J Oncol 2021;36:519-528. DO - 10.5505/tjo.2021.2849