Observational studies in systematic [corrected] reviews of comparative effectiveness: AHRQ and the Effective Health Care Program.
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P. Shekelle | M. Oremus | D. Atkins | S. Norris | R. Kane | S. Morton | M. Viswanathan | M. Ospina | W. Bruening | K. Schoelles | Eric S. Johnson | Gurvaneet Randhawa | Steven Fox | Karen Schoelles