William Benjamin Schwartz (May 16, 1922 – March 15, 2009) was a pioneering nephrologist who identified rising costs of health care as an incipient problem as early as the 1980s. Schwartz attended Duke University after serving in the Army in World War II, earning undergraduate and medical degrees. His pioneering observation that the antibiotic sulfanilamide increased excretion of sodium in patients with heart failure led to the discovery and development of modern diuretic drugs. The Lancet. The syndrome is named after him, along with Frederic Bartter.