- Correspondence to: Dr Jean-Charles Lambert unité INSERM 508, Institut Pasteur de Lille, BP 245,1 rue du professeur Calmette, 59019 Lille cédex, France;
- Received 1 July 2004
- Accepted 15 October 2004
- Revised 14 October 2004
- Published in print 1 July 2005.
- Published online 16 June 2005.
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