HLA-G and Platelet storage pool disease: Nine clinical variables (male sex, SPD in the highest quartile, histologic grade 3A, >2 extranodal sites, ECOG PS >1, hemoglobin <12 g/dL, β2 microglobulin >institutional upper limit of normal [ULN], peripheral blood absolute natural killer [NK] cell count <100/μL and serum lactate dehydrogenase [LDH] > ULN) were retained by the methodology and selected for inclusion in the final model based on their HRs for PFS (Table S2).