A Case Report of Sequential Use of a Yeast-CEA Therapeutic Cancer Vaccine and Anti-PD-L1 Inhibitor in Metastatic Medullary Thyroid Cancer oleh Jaydira Del Rivero, Jaydira Del Rivero, Renee N. Donahue, Jennifer L. Marté, Ann W. Gramza, Marijo Bilusic, Myrna Rauckhorst, Lisa Cordes, Maria J. Merino, William L. Dahut, Jeffrey Schlom, James L. Gulley, Ravi A. Madan