Randomized Phase III Trial of Prophylactic Cranial Irradiation With or Without Hippocampal Avoidance for Small-Cell Lung Cancer (PREMER): A GICOR-GOECP-SEOR Study - Rodríguez de Dios, N; Couñago, F; Murcia-Mejía, M (J Clin Oncol, 2021)