Electrocardiographic classification and abbreviated lead system for population-based studies of Chagas' disease.
Maguire JH, Mott KE, Souza JA, Almeida EC, Ramos NB, Guimarães AC. Electrocardiographic classification and abbreviated lead system for population-based studies of Chagas' disease. Bull Pan Am Health Organ. 1982; 16(1):47-58.