The French parliamentary commission into doping has revealed that Jalabert was using EPO in the 1998 TDF. In 2004 the AFLD retroactively tested samples and determined the positive, and the commission pulled out the previously anonymous results as part of their enquiry.
http://www.lequipe.fr/Cyclisme-sur-route/Actualites/Jalabert-positif-a-l-epo-en-1998/381138
http://www.lequipe.fr/Cyclisme-sur-route/Actualites/Jalabert-positif-a-l-epo-en-1998/381138