PDIA3 and laryngeal carcinoma: ERp57 is upregulated in radioresistant laryngeal cancer HEp-2 (RR-HEp-2) cells and two other laryngeal cancer SNU899 and SNU1076 cells, which are more radioresistant than the control HEp-2 cells (Fig. 1A, Supplementary Fig. 1A and B).