AGR2 and cancer: We thank Jennilee Kho in urine collection, Olivia Wong for assistance in performing AGR2 ELISA, Dr. Robert Vessella of Genitourinary Cancer Research Laboratory in UW Urology for LuCaP 23.12; Dr. Zhi Sun at the Institute for Systems Biology (Seattle, WA) for assistance in the query of PeptideAtlas; Elizabeth Vitello for editorial comments.