1. Department of Medical Microbiology and Infection Control; VU University Medical Center; van der Boechorststraat 7 1081 BT Amsterdam The Netherlands
2. Mycobacterial Research Division; National Institute for Medical Research; The Ridgeway Mill Hill London NW7 1AA UK
3. Division of Cell Biology-B6; Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital (NKI-AVL); 1066 CS Amsterdam The Netherlands
4. School of Biosciences; University of Birmingham; Edgbaston Birmingham B15 2TT UK
5. Department of Molecular Microbiology; VU University; de Boelelaan 1085 1081 HV Amsterdam The Netherlands