Some (but not all) NIH clinical trials include travel expenses, according to an article in the October 2009 issue of Washingtonian magazine about the NIH clinical trials program (see second-to-last paragraph on the second page). You never know until you ask.

Leslie

April 2006: Husband dx by dentist with leukoplakia on tongue. Oral surgeon's biopsy 4/28/06: Moderate dysplasia; pathology report warned of possible "skip effect." ENT's excisional biopsy (got it all) 5/31/06: SCC in situ/small bit superficially invasive. Early detection saves lives.