OKLAHOMA CITY, OK, AUSTIN, TX, BARCELONA, SPAIN, February 15, 2022 – Pure Transplant Solutions, LLC (PTS), a collaboration driven biotechnology company focused on the development of human leukocyte antigen (HLA)-based diagnostics and therapeutics within the field of transplantation, is proud to announce that it has entered into a research collaboration with Vall d’Hebron Barcelona Hospital Campus to develop new technologies for B-cell monitoring in transplant rejection.