If you want to accelerate the process you might try this-
Take a salad bowl, small saucepan or equivalent vessel, and fill it with tepid water. Add and mix-in 1-2 tablespoons of baking soda. Immerse the cards and slosh them around for about 15 minutes. Rinse and dry. Air for a few hours before you put them back in the box.
Worked for me.
btw- Modiano's have a similar odoriferous nature, and can be treated the same way.
