APPENDIX S1. Alphabetical list of COBCON participants

APPENDIX S2. Activity-based costing: process flow diagram (LEVEL 1: Surgical patients—allogeneic blood transfusion)

APPENDIX S3. Activity-based costing: process flow diagram (LEVEL 2: Surgical patients—administering & monitoring transfusion on ward)

TABLE S1. Hospital blood bank supply management for RBCs

TABLE S2. Pre-transfusion processes

TABLE S3. Patient blood testing processes

TABLE S4. Specific transfusion consent form

TABLE S5. Issuing and delivering components from blood bank to transfusion sites

TABLE S6. Administering and monitoring transfusions

TABLE S7. Managing acute transfusion reactions and hemovigilance

TABLE S8. Post-transfusion logistics

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