Fatal varicella in an immunocompromised adult associated with a European genotype E2 variant of varicella zoster virus - Springfeld, C.; Sauerbrei, A.; Filusch, A.; Konstandin, M.; Hartschuh, W.; Sauer, P.; Encke, J.; Stremmel, W.; Schnitzler, P. (Journal of Clinical Virology, 2009)