PAX6 and nasopharyngeal carcinoma: We found that cells weakly positive for TRA-1-60 and/or rBC2LCN were present in hiPSC-NPC preparations, and we categorized cell types found in hiPSC-NPC preparations into four groups according to their marker (TRA-1-60, rBC2LCN, and PAX6) expression patterns (Supplementary Table S1).