1. University Department of Internal Medicine; Kantonsspital Aarau; Aarau Switzerland
2. University Clinic of Infectious Diseases; University Hospital Bern; Bern Switzerland
3. Division of Infectious Diseases; University Department of Internal Medicine; Kantonsspital Aarau; Aarau Switzerland
4. Department of Laboratory Medicine; Kantonsspital Aarau; Aarau Switzerland