The Kelsey-Seybold Clinic is a large multi-specialty clinic system located in Greater Houston with its administrative headquarters in Shadow Creek Ranch, Pearland. The clinic system is a major provider of healthcare for NASA and a center for healthcare research. The formation of starting 1949 by Dr. Mavis P. Kelsey with the purpose of combining primary and specialty medical services in one location in the city of Houston. This was a popular concept of the day based on the Mayo Clinic model. These types of clinics bring specialists, primary care physicians, nurses and other care givers together as a team to provide the best possible care. In 1949, Dr. Kelsey, an internal medicine specialist, leased space in the Hermann Professional Building and set up his practice. Over the next two years, he would welcome two of his Mayo friends, Dr. William D. Seybold, a surgeon, and Dr. William V. Leary, another internist, to the practice.