Leslie Gifford Kilborn was born in 1895 in Kiating, West China. He was the eldest child of Drs. Omar and Retta Kilborn. Leslie attended university in Toronto, Canada, enrolling at Victoria College in 1913. He graduated in 1917, then continued his studies at the University of Toronto, earning a M.A. in Physiology in 1918, an M.D. in 1921, and a Ph.D. in 1928. Kilborn married Dr. Janet R. McClure, the daughter of missionaries in the Canadian Presbyterian Mission in north China. They sailed to West China in the fall of 1921 and spent their first year and a half studying Chinese in Penghsien. In 1923 they began work at West China Union University. Janet passed away in 1945; in 1947 Kilborn married Jean E. Millar, an anesthetic specialist from Guelph, Ontario. She had served as a missionary for the Woman's Missionary Society in Chinese hospitals between 1932 and 1946. Kilborn held a number of administrative roles at West China Union University. He served as Dean of the Faculty of Medicine from 1936-1947, and Director of the College of Medicine of Medicine and Dentistry from 1939-1950. In 1952, he left China and became the professor of physiology at the University of Hong Kong, eventually becoming vice-president of Chung Chi College. They returned to Canada in 1963. Leslie died in 1972, Janet died in 1982.