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Benveniste H, Hedlund LW, Johnson GA.Benveniste H, et al. Among authors: johnson ga.Stroke. 1992 May;23(5):746-54. doi: 10.1161/01.str.23.5.746.Stroke. 1992.PMID: 1374575
Banson ML, Cofer GP, Black R, Johnson GA.Banson ML, et al. Among authors: johnson ga.Invest Radiol. 1992 Feb;27(2):157-64. doi: 10.1097/00004424-199202000-00013.Invest Radiol. 1992.PMID: 1601608
Brouwer M, Engel DW, Bonaventura J, Johnson GA.Brouwer M, et al. Among authors: johnson ga.J Exp Zool. 1992 Aug 1;263(1):32-40. doi: 10.1002/jez.1402630105.J Exp Zool. 1992.PMID: 1645119