The UT Southwestern Medical Center is one of the patient care providers and research institutions in the United States. The center offers a variety of educational programs for physicians, scientists and other health care professionals. It serves more than 4,200 students, residents and postdoctoral fellows each year. The center has a library that stocks journals and e-journals and science and medical reference books. It offers various undergraduate- and postgraduate-level distance-learning programs for students. It provides research programs in the fields of physics, computer science, mathematics and chemistry. The UT Southwestern Medical Center conducts clinical trials for the development of drugs for the treatment of diseases. The center is located in Dallas.