2
by Helfand, Mark
Published 2009
Oregon Health & Science University

3
by Helfand, Mark
Published 2007
Oregon Health & Science University

4
by Peterson, Kim, Helfand, Mark, Humphrey, Linda L., Christensen, Vivian A.
Published 2013
Department of Veterans Affairs, Health Services Research And Development Service

5
by Helfand, Mark, Peterson, Kim, Carson, Susan, Humphrey, Linda L.
Published 2013
Department of Veterans Affairs, Health Services Research & Development Service

6
by Carson, Susan, Peterson, Kim, Humphrey, Linda L., Helfand, Mark
Published 2013
Department of Veterans Affairs, Health Services Research & Development Service

7
by Helfand, Mark
Published 2009
Oregon Health & Science University

8
by Helfand, Mark
Published 2005
Oregon Health & Science University, Evidence-Based Practice Center

9
by Chou, Roger, Helfand, Mark, Peterson, Kim, Dana, Tracy
Published 2006
Agency for Healthcare Research and Quality (US)

11
by Helfand, Mark
Published 2007
Oregon Health & Science University

12
by Chou, Roger, Helfand, Mark, Peterson, Kim, Dana, Tracy
Published 2006
Agency for Healthcare Research and Quality (US)

13
by Helfand, Mark
Published 2005
Oregon Health & Science University, Evidence-Based Practice Center