Thomas Buhr, Konnie Hebeda, Vassiliki Kaloutsi, Anna Porwit, Jon Van der Walt and Hans Kreipe (2012) “European Bone Marrow Working Group trial on reproducibility of World Health Organization criteria to discriminate essential thrombocythemia from prefibrotic primary myelofibrosis. Haematologica 2012;97(3):360–5 - Reply”, Haematologica. Pavia, Italy, 97(3), pp. e7-e8. doi: 10.3324/haematol.2012.063446.