YAP1 and plasma cell myeloma: The prognostic significances of YAP1/MYC were further confirmed in 4 external independent datasets including GEO datasets (GSE9782 and GSE2658), TCGA dataset (MMRF-COMPASS), and Oncomine dataset (Zhan myeloma 2) in over 2,000 MM patients (Figures 3B, C and Figures S3C, D).