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Stewart WJ, Currie PJ, Salcedo EE, Klein AL, Marwick T, Agler DA, Homa D, Cosgrove DM.Stewart WJ, et al. Among authors: klein al.J Am Coll Cardiol. 1992 Nov 15;20(6):1353-61. doi: 10.1016/0735-1097(92)90248-l.J Am Coll Cardiol. 1992.PMID: 1430686Free article.Review.
Cohen GI, Klein AL, Chan KL, Stewart WJ, Salcedo EE.Cohen GI, et al. Among authors: klein al.Am J Cardiol. 1992 Oct 1;70(9):925-9. doi: 10.1016/0002-9149(92)90740-p.Am J Cardiol. 1992.PMID: 1529948
Ding ZP, Oh JK, Klein AL, Tajik AJ.Ding ZP, et al. Among authors: klein al.J Am Soc Echocardiogr. 1991 Sep-Oct;4(5):451-6. doi: 10.1016/s0894-7317(14)80378-7.J Am Soc Echocardiogr. 1991.PMID: 1742032
Klein AL, Tajik AJ.Klein AL, et al.J Am Soc Echocardiogr. 1991 Jul-Aug;4(4):379-92. doi: 10.1016/s0894-7317(14)80448-3.J Am Soc Echocardiogr. 1991.PMID: 1910836Review.