Case report: fatal course of endocarditis following an infection with non-toxigenic Corynebacterium diphtheriae biotype var mitis Holfelder, M and Bock-Hensley, O and Lisson, C and Funke, G, Weekly releases (1997–2007), 8, 2397 (2004), https://doi.org/10.2807/esw.08.09.02397-en