Updated and expanded study of polycythemia vera and other myeloproliferative neoplasms in the tri-county area.INTRODUCTION
 The objectives of this study were 1) to assess PV reporting to the PCR in 2006-2009, 2) to determine whether a cancer cluster persisted, and 3) to determine whether other myeloproliferative neoplasms (MPNs), including essential thrombocytopenia (ET), were subject to similar reporting problems.



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