- 2001
| Laboratory of malaria immunology (WEHI), Melbourne, Australia |
| Funding of a journey of 3 weeks by the Human Frontier Science Program |
- 2004 and 2005
| Institute René Rachou (FIOCRUZ), Belo Horizonte, Brazil |
| Funding of two journeys of 2 and 4 weeks by the "Deutscher Akademischer Austausch Dienst" |
- 2004 to 2008
| Institute of medical microbiology, University of Göttingen, Germany |
| Five journeys of 1 to 3 weeks |
- 2007 and 2008
| Institute of microbiology and Hygiene, University of Berlin, Germany |
| Two journeys of 1 and 2 weeks |
| Unit of structural and functional glycobiology (UGSF), University of Lille, France |
| Two journeys of 5 and 3 weeks |