International Society of Blood Transfusion Working Party on Red Cell Immunogenetics and Blood Group Terminology Report of Gothenburg, Barcelona and four virtual business meetings: Update on blood group systems. - Hyland CA; Castilho L; Chen Q; Clausen FB; Denomme GA; Fichou Y; Flegel WA; Floch A; Gleadall NS; Hellberg Å; Ji Y; Karamatic Crew V; et al. (Vox sanguinis, 2026)