GP6 and autoimmune thrombocytopenic purpura: Further, platelet binding by anti‐platelet autoantibodies, which is central to ITP pathogenesis,1, 10, 11, 12 can cause rapid and irreversible proteolytic release of receptor ectodomains such as soluble GPVI (sGPVI) and soluble triggering receptor expressed on myeloid cells‐like (Trem)‐like transcript‐1 (sTLT‐1).13