Atlas of Normal Roentgen Variants That May Simulate Disease KEATS, THEODORE E. (ALUMNI PROFESSOR OF RADIOLOGY, DEPARTMENT OF RADIOLOGY, UNIVERSITY OF VIRGINIA HEALTH SYSTEMS, CHARLOTTESVILLE, VA),ANDERSON, MARK W. (HARRISON DISTINGUISHED TEACHING PROFESSOR OF RADIOLOGY; CHIEF, MUSCULOSKELETAL IMAGING, PROFESSOR OF ORTHOPAEDIC SURGERY, UNIVERSITY OF VIRGINIA, CHARLOTTESVILLE, VIRGINIA)