ood-poisoning case, which were bought and taken by truck to regional warehouses by big distributors. These contracts proved to be another black box. Debbie Mitchell, a spokeswoman for Cardinal Health, one of the three largest distributors, said she could not discuss costs or prices under “disclosure rules relativ

food-poisoning case, which were bought and taken by truck to regional warehouses by big distributors. These contracts proved to be another black box. Debbie Mitchell, a spokeswoman for Cardinal Health, one of the three largest distributors, said she could not discuss costs or prices under "disclosure rules relativ