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Ritchie JL, Hamilton GW, Trobaugh GB, Weaver WD, Williams DL, Cobb LA.Ritchie JL, et al. Among authors: hamilton gw.Am J Cardiol. 1977 May 26;39(6):852-7. doi: 10.1016/s0002-9149(77)80039-8.Am J Cardiol. 1977.PMID: 871111
Ritchie JL, Narahara KA, Trobaugh GB, Williams DL, Hamilton GW.Ritchie JL, et al. Among authors: hamilton gw.Circulation. 1977 Nov;56(5):830-6. doi: 10.1161/01.cir.56.5.830.Circulation. 1977.PMID: 303157
Caldwell JH, Ritchie JL, Hamilton GW.Caldwell JH, et al. Among authors: hamilton gw.Cardiovasc Clin. 1979;10(2):213-23.Cardiovasc Clin. 1979.PMID: 487372
Ritchie JL, Trobaugh GB, Hamilton GW, Gould KL, Narahara KA, Murray JA, Williams DL.Ritchie JL, et al. Among authors: hamilton gw.Circulation. 1977 Jul;56(1):66-71. doi: 10.1161/01.cir.56.1.66.Circulation. 1977.PMID: 862173
Hamilton GW, Ritchie JL, Allen D, Lapin E, Murray JA.Hamilton GW, et al.Am Heart J. 1975 Jun;89(6):708-15. doi: 10.1016/0002-8703(75)90185-4.Am Heart J. 1975.PMID: 1130263