----------------------------Original message---------------------------- I am in the process doing research involving the spatial distribution of brain tumors in the United States. Does anyone have any information about any studies done using GIS or desktop mapping software to show the distribution of brain tumors in the United States? I have seen other studies done using GIS to show the distribution of other types of cancer, but not brain tumors (cancers). If you have please e-mail me at [log in to unmask], or post on the list. Thank you. Sincerely Tim S. Hayes Chief Cartographer Medical GIS Consulting Services [log in to unmask]