2
by Helfand, Mark
Published 2007
Oregon Health & Science University

3
by Helfand, Mark
Published 2004
Agency for Healthcare Research and Quality (US)

4
by Helfand, Mark
Published 2007
Oregon Health & Science University

5
by Helfand, Mark
Published 2009
Oregon Health & Science University

6
by Helfand, Mark
Published 2006
Oregon Health & Science University, Evidence-Based Practice Center

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

8
by Helfand, Mark
Published 2006
Oregon Health & Science University, Evidence-Based Practice Center

9
by Helfand, Mark
Published 2001
Agency for Healthcare Research and Quality (US)

10
by Helfand, Mark
Published 2004
Agency for Healthcare Research and Quality (US)

11
by Helfand, Mark
Published 2007
Dept. of Veterans Affairs, Health Services Research & Development Service

12
by Helfand, Mark
Published 2009
Agency for Healthcare Research and Quality

13
by Helfand, Mark
Published 2008
Department of Veterans Affairs, Health Services Research & Development Service

14
by Helfand, Mark
Published 2009
Oregon Health & Science University

15
by Helfand, Mark
Published 2001
Oregon Health & Science University, Evidence-Based Practice Center

16
by Helfand, Mark
Published 2006
Oregon Health & Science University, Evidence-Based Practice Center

17
by Helfand, Mark
Published 2009
Oregon Health & Science University

18
by Helfand, Mark
Published 2001
Oregon Health & Science University, Evidence-Based Practice Center

19
by Helfand, Mark
Published 2009
Oregon Health & Science University

20
by Helfand, Mark
Published 2007
Dept. of Veterans Affairs, Health Services Research & Development Service