WALLACE E. CARROLL, M.D., a pathologist, died Mar. 23, 2016, at age 82. He was a member of Delta Kappa Epsilon and received his medical degree from the University of Pennsylvania after a year in Germany as a Fulbright Scholar. Drafted into the U.S. Army, he was in charge of the laboratory and blood bank at Fort Leonard Wood in Missouri for two years. At Cottage Hospital in Santa Barbara, Calif., he worked as a pathologist, in addition to being in charge of the school of medical technology, the blood bank, and infectious disease control. For many years, he and his cousin worked on an invention that would revolutionize assessment of blood coagulation. He also ran 16 marathons, including Boston twice. Among those who survive are his wife, Maria Luisa Lahusen Carroll, four children, 10 grandchildren, three great-grandchildren, his brother, and his cousin.