C Lange1, D Chesov2, J Heyckendorf3. 1. Research Centre Borstel, Clinical Infectious Diseases, German Centre for Infection Research (DZIF), Borstel, Germany; International Health/Infectious Diseases, University of Lübeck, Lübeck, Germany; Department of Medicine, Karolinska Institute, Stockholm, Sweden. Electronic address: clange@fz-borstel.de. 2. Research Centre Borstel, Clinical Infectious Diseases, German Centre for Infection Research (DZIF), Borstel, Germany; State University for Medicine and Pharmacy, Chisinau, Republic of Moldova. 3. Research Centre Borstel, Clinical Infectious Diseases, German Centre for Infection Research (DZIF), Borstel, Germany; International Health/Infectious Diseases, University of Lübeck, Lübeck, Germany.