Tumor programmed cell death ligand 1 expression correlates with nodal metastasis in patients with cutaneous squamous cell carcinoma of the head and neck

1. García-Pedrero, J.M.
2. Martínez-Camblor, P.
3. Diaz-Coto, S.
4. Munguia-Calzada, P.
5. Vallina-Alvarez, A.
6. Vazquez-Lopez, F.
7. Rodrigo, J.P.
8. Santos-Juanes, J.