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Keren A, Kim CB, Hu BS, Eyngorina I, Billingham ME, Mitchell RS, Miller DC, Popp RL, Schnittger I.Keren A, et al. Among authors: popp rl.J Am Coll Cardiol. 1996 Sep;28(3):627-36. doi: 10.1016/0735-1097(96)00186-6.J Am Coll Cardiol. 1996.PMID: 8772749Free article.
Nellessen U, Schnittger I, Appleton CP, Masuyama T, Bolger A, Fischell TA, Tye T, Popp RL.Nellessen U, et al. Among authors: popp rl.Circulation. 1988 Oct;78(4):848-55. doi: 10.1161/01.cir.78.4.848.Circulation. 1988.PMID: 3168192
Schnittger I, Appleton CP, Hatle LK, Popp RL.Schnittger I, et al. Among authors: popp rl.J Am Coll Cardiol. 1988 Jan;11(1):83-8. doi: 10.1016/0735-1097(88)90170-2.J Am Coll Cardiol. 1988.PMID: 3335709Free article.