Use of standard Del Nido cardioplegia for the intracardiac repair of tetralogy of Fallot: A systematic review and meta-analysis of randomized controlled trials oleh Shajie Ur Rehman Usmani, Syed Umar Hasan, Syeda Hoorulain Ahmed, Neha Pervez, Amna Zia, Qiudong Chen, George Gill, Georgina Rowe, Saba Alvi, Muhammad Mujeeb Zubair