Orouji, Azadeh, Alexander Kiewert, Thomas Filser, Sergij Goerdt, and Wiebke K. Peitsch. 2011. “Cutaneous Diphtheria in a German Man With Travel History”. Acta Dermato-Venereologica 92 (2):179-80. https://doi.org/10.2340/00015555-1216.