tokens: Immunological testing was performed on all brewery workers and some control volunteers using skin prick testing with hops , barley , and yeast antigens as well as other nonoccupational allergens , and by determining total serum IgE levels .
folded_tokens: immunological testing be perform on all brewery worker and some control volunteer use skin prick testing with hop , barley , and yeast antigen as well as other nonoccupational allergen , and by determine total serum ige level .