Health Care and Social Assistance is highly specialized in metropolitan Birmingham, employing approximately 58,900 persons. The University of Alabama at Birmingham (UAB) Health System employs 21,550 and is Alabama’s largest employer. Encompassing 83 city blocks, UAB is the fourth largest academic medical center in the United States. UAB is nationally ranked among Top-20 in federal research funding and key areas of health sciences receive more than $450 million annually in research dollars. UAB also serves as a hub for international research from off-site facilities around the world. Other notable health care facilities in the Birmingham region include: the Benjamin Russell Hospital for Children (which ranks among the top ten busiest pediatric medical centers in the nation) and the Lakeshore Foundation, one of the nation’s premiere fitness, recreation, and education facilities for persons with physically disabling conditions. Lakeshore Foundation has served as a host to Special Olympic events and is the first official U.S. Olympic training site equipped for both Olympic and Paralympic athletes. Birmingham based HealthSouth Corporation is the nation’s largest owner and operator of inpatient rehabilitation hospitals. Because of its location and excellent transportation system, Vestavia Hills is the home of several medical specialist offices which feed into these excellent facilities.