http://clusteralliance.org/2007/12/07/evidence-for-an-environmental-influence-leading-to-the-development-of-jak2v617f-positive-polycythemia-vera-a-molecular-epidemiological-study/ National Disease Clusters Alliance Thu, 09 Jun 2011 00:48:32 +0000 hourly 1 http://wordpress.org/?v=3.1.3