From the Departments of Radiology (M. W. Anderson and A. Greenspan), Physical Medicine and Rehabilitation (V. Ugalde), and Family Practice (M. Batt), University of California, Davis Medical Center, Sacramento, CA. Address correspondence and reprint requests to Dr. M. W. Anderson at Department of Radiology, University of California, Davis Medical Center, TICON II, 2516 Stockton Boulevard, Sacramento, CA 95817, U.S.A.
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Anderson et al. (1996) studied this question.
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