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Littmann L, Monroe MH, Svenson RH.Littmann L, et al.Mayo Clin Proc. 2000 Aug;75(8):845-9. doi: 10.4065/75.8.845.Mayo Clin Proc. 2000.PMID: 10943241Review.
Littmann L, Monroe MH.Littmann L, et al.Mayo Clin Proc. 2016 Jan;91(1):120-1. doi: 10.1016/j.mayocp.2015.10.015.Mayo Clin Proc. 2016.PMID: 26763515No abstract available.
Esser SM, Monroe MH, Littmann L.Esser SM, et al. Among authors: littmann l.Eur Heart J. 2009 Jul;30(14):1752. doi: 10.1093/eurheartj/ehp197. Epub 2009 May 19.Eur Heart J. 2009.PMID: 19454576No abstract available.