Monday, October 13, 2008 - 12:56PM EST

United States

Oregon

Name of AuthorInstitutional Affiliation
Smith PROregon Evidence-based Practice Center, Center for Health Research, Kaiser Permanente, Portland, Oregon 97227-1110, USA.
Whitlock EPOregon Evidence-based Practice Center, Center for Health Research, Kaiser Permanente, Portland, Oregon 97227-1110, USA.