The author acknowledges the assistance of memebers of the PROMIS Laboratory, the Departments of Medicine and Obstetrics/Gynecology and the Medical Center Hospital of Vermont. The work described here was funded primarily by the Department of Health, Education, and Welfare, Health Resources Administration, National Center for Health Services Research, Division of Health Care Information Systems and Technology (PHS R18 00175 and HRA 230ndash;76ndash;0099), with additional support from the Robert Wood Johnson Foundation. The environment for this development work was provided by the Medical Center Hospital of Vermont and the Departments of Medicine and Obsterics/Gynecology, University of Vermont, Burlington, Vermont.
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