Metastatic Squamous Cell Carcinoma to the Cervical Lymph Nodes From an Unknown Primary Cancer: Management in the HPV Era - Civantos, Francisco J; Vermorken, Jan B; Shah, Jatin P; Rinaldo, Alessandra; Suarez, Carlos; Kowalski, Luiz Paulo; Rodrigo, Juan P; Olsen, Kerry; Strojan, Primoz; Makitie, Antti A (Frontiers in oncology, 2020)