1
by Chou, Roger, Helfand, Mark, Peterson, Kim, Dana, Tracy
Published 2006
Agency for Healthcare Research and Quality (US)

2
by Helfand, Mark
Published 2005
Oregon Health & Science University, Evidence-Based Practice Center

4
by Chou, Roger, Helfand, Mark, Peterson, Kim, Dana, Tracy
Published 2006
Agency for Healthcare Research and Quality (US)

5
by Helfand, Mark
Published 2007
Oregon Health & Science University

7
by Helfand, Mark
Published 2005
Oregon Health & Science University, Evidence-Based Practice Center

8
by Helfand, Mark
Published 2007
Oregon Health & Science University