AU - BENJAMIN JE, BROOKS ER TI - TWo new diagnostic methods for patients with cardiac disease PT - JOUR DP - 1919 TA - Journal of the American Medical Association pages = {707-709}, VI - 72 IP - 10 AID - 10.1001/jama.1919.02610100015006 [doi] 4100 - http://dx.doi.org/10.1001/jama.1919.02610100015006 SO - Journal of the American Medical Association March 8, 1919 72(10):707