Zheng Zhou Marco Antonio Gutierrez Jorge Documet Lawrence Chan H. K. Huang Brent J. Liu The role of a Data Grid in worldwide imaging-based clinical trials. 21-33 2007 16 J. High Speed Networks 1 http://iospress.metapress.com/openurl.asp?genre=article&issn=0926-6801&volume=16&issue=1&spage=21 db/journals/jhsn/jhsn16.html#ZhouGDCHL07