From the *Department of Health Sciences, EMGO Institute for Health and Care Research, VU University, Amsterdam, The Netherlands; †Department of Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands; ‡RAND Health, Santa Monica, CA; §RTI International, Research Triangle Park, NC; and ¶West Los Angeles VA Medical Center, Los Angeles, CA.
The manuscript submitted does not contain information about medical device(s)/drug(s).
No funds were received in support of this work. No benefits in any form have been or will be received from a commercial party related directly or indirectly to the subject of this manuscript.
Maurits van Tulder, Lex Bouter, and Paul Shekelle were responsible for conception and design of the study; Maurits van Tulder, Marika Suttorp, and Paul Shekelle were involved in acquisition of data; Marika Suttorp and Sally Morton had full access to all of the data in the study, conducted the analysis and take responsibility for the integrity of the data and the accuracy of the data analysis; all authors were involved in interpretation of data; Maurits van Tulder and Paul Shekelle drafted the article; all authors were involved in revising the article critically for important intellectual content and in final approval of the version to be published.
Address correspondence and reprint requests to Maurits van Tulder, PhD, Department of Health Sciences, VU University Amsterdam, The Netherlands; E-mail: [email protected]
