1. Rega Institute for Medical Research, Medicinal Chemistry, KU Leuven, Herestraat 49-Box 1041, 3000 Leuven, Belgium
2. Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Via Marzolo 5, 35131 Padova, Italy
3. Department of Infectious Disease Research, Drug Development, Southern Research Institute, 431 Aviation Way, Frederick, Maryland 21701, United States
4. Department of Microbiology and Immunology, Georgetown University Medical Center, 20057 Washington, D.C., United States