Quigg T, Skiles J, Keating A, Mahadeo K, Salzberg D, Madden L, Phelan R, Lalefar N, Caywood E, Hanna R, Bhatt S, Stefanski H, Horn B, Oshrine B, Higham C, Duffner U, Chewning J, Law J, Shah N, Huo J, Lehmann L, Ahmed I, Pulsipher M, Abdel-Azim H. 159 Relapse Risk for B-ALL Patients By Pre-Hematopoietic Cell Transplantation (HCT) Next-Generation Sequencing (NGS-MRD): An Interim Analysis of Observational Arm Subjects on Pediatric Transplantation and Cellular Therapy Consortium (PTCTC) ONC1701. Transplantation And Cellular Therapy 2022, 28: s130-s131. DOI: 10.1016/s2666-6367(22)00320-7.Peer-Reviewed Original Research