Capecchi G. CO59 | JAK2 46/1 haplotype and JAK2 variant allelic frequency correlate with the development of polycythemic phenotype in JAK2-mutated essential thrombocytemia patients: <a href="https://haematologica.org/search/search?query=G.+Capecchi">G. Capecchi</a>^1|2, <a href="https://haematologica.org/search/search?query=C.+Maccari">C. Maccari</a>^1|2, <a href="https://haematologica.org/search/search?query=L.+Signori+L">L. Signori L</a>^1|2, <a href="https://haematologica.org/search/search?query=G.G.+Loscocco">G.G. Loscocco</a>^1|2, <a href="https://haematologica.org/search/search?query=V.+Boldrini">V. Boldrini</a>^1|2, <a href="https://haematologica.org/search/search?query=G.+Borgi+G">G. Borgi G</a>^1|2, <a href="https://haematologica.org/search/search?query=G.+Rotunno">G. Rotunno</a>^1|2, <a href="https://haematologica.org/search/search?query=F.+Gesullo">F. Gesullo</a>^1|2, <a href="https://haematologica.org/search/search?query=E.+Nacca">E. Nacca</a>^1|2, <a href="https://haematologica.org/search/search?query=S.+Pestelli">S. Pestelli</a>², <a href="https://haematologica.org/search/search?query=I.+Sestini">I. Sestini</a>¹, <a href="https://haematologica.org/search/search?query=T.+Barbui">T. Barbui</a>³, <a href="https://haematologica.org/search/search?query=A.M.+Vannucchi">A.M. Vannucchi</a>^1|2, <a href="https://haematologica.org/search/search?query=P.+Guglielmelli">P. Guglielmelli</a>^1|2 | <i>¹CRIMM, Center for Research and Innovation of Myeloproliferative Neoplasms, AOU Careggi, University of Florence; ²Department of Experimental and Clinical Medicine, University of Florence; ³FROM Ospedale Papa Giovanni XXIII</i&gt;. Haematologica;111(s1):; https://doi.org/10.3324/haematol.2026.s1.62.