Br. j. haematol. Br. j. haematol. WHO-histological criteria for myeloproliferative neoplasms: reproducibility, diagnostic accuracy and correlation with gene mutations and clinical outcomes Alvarez-Larrán Alberto Ancochea Agueda García Mar Climent Fina García-Pallarols Francesc Angona Anna Senín Alicia Barranco Carlos Martínez-Avilés Luz Serrano Sergio Bellosillo Beatriz Besses Carlos 2014 research-article