Valerie Y. Chock, MD, MS Epi; Haresh Kirpalani, BM, MSc; Van Meurs, MD et. al Tissue Oxygenation Changes After Transfusion and Outcomes in Preterm Infants A Secondary Near Infrared Spectroscopy Study of the Transfusion of Prematures Randomized Clinical Trial (TOP NIRS) JAMA Network Open. 2023