title: IN MEMORIAM. Sam A. Threefoot, MD, April 10, 1921- April 25, 2015.
authors.forename: Barbara S
authors.initials: BS
authors.lastname: Mattingly
mesh_terms: D035843:Biomedical Research / Q000266:history*; D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D008208:Lymphatic System / Q000033:anatomy & histology / Q000502:physiology; D055820:New Orleans