unteer effort to improve the scientific basis of  clinical practice over a sustained 6-year pe-
riod. Susan K. Schultz, M.D., who served as text editor, worked tirelessly with Emily A.
Kuhl, Ph.D., senior science writer and DSM-5 st aff text editor, to coordinate the efforts of
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,