. Competing Interests The authors declare that no competing interests exist. Authors’ Contributions Dr. Hai-lu Zhao designed the study. Yan-hong Pan prepared the manuscript. Min Wang and Yan-mei Huang directed
Introduction: The effects of renin–angiotensin system blockade with angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin II type 1 receptor blockers (ARBs) on cancer remain inconsistent.