Using formative evaluation in an implementation project to increase vaccination rates in high-risk veterans: QUERI Series

Carolyn M Wallace*† and Marcia W Legro† Address: Health Services Research & Development, VA Puget Sound Health Care System, Seattle, Washington, USA Email: Carolyn M Wallace* - Carolyn.Wallace1@va.gov; Marcia W Legro - mwlegro@msn.com * Corresponding author †Equal contributors Published: 22 April 2008 Implementation Science 2008, 3:22 doi:10.1186/1748-5908-3-22 Received: 18 August 2006 Accepted: 22 April 2008