The James W. Aston Ambulatory Care Center, based in Dallas, offers health care services to residents of the area. The center is located on the campus of the University of Texas Southwestern Medical Center at Dallas. The university medical center is one of the leading academic medical centers, patient-care providers and research institutions in the United States. Its physicians attend to patients at University Hospitals & Clinics, Parkland Health & Hospital System, Children's Medical Center Dallas, the VA North Texas Health Care System, and numerous other affiliated hospitals and clinical centers in Dallas and Fort Worth, Texas. Its physicians and residents additionally provide inpatient hospital care to more than 90,000 people and oversee over 1.5 million outpatient visits annually.