1
by Nelson, Heidi D., Bougatsos, Christina, Nygren, Peggy
Published 2008
Agency for Healthcare Research and Quality (US)

2
by Shipman, Scott, Helfand, Mark, Nygren, Peggy, Bougatsos, Christina
Published 2006
Agency for Healthcare Research and Quality (US)

3
by Rischitelli, Gary, Nygren, Peggy, Bougatsos, Christina, Freeman, Michele
Published 2006
Agency for Healthcare Research and Quality (US)

4
by Norris, Susan L., Kansagara, Devan, Bougatsos, Christina, Nygren, Peggy
Published 2008
Agency for Healthcare Research and Quality (US)