the work groups into a cohesive whole. Willia m E. Narrow, M.D., M. P.H., led the research
group that developed the overall research stra tegy for DSM-5, including the field trials,
that greatly enhanced the eviden ce base for this revision. In addition, we are grateful to
those who contributed so much time to the in dependent review of the revision proposals,
including Kenneth S. Ke ndler, M.D., and Robert Freedman , M.D., co-chairs of the Scien-
tific Review Committee; John S. McIntyre, M.D., and Joel Ya ger, M.D., co-chairs of the
Clinical and Public Health Committee; and Glenn Martin, M.D., chair of the APA Assem-