1. control groups in bronchial reactivity to allergens at home or in the workplace.
2. histamine symptom scores peak expira- Further studies are needed to determine
3. tory flow rates or medication require- which group of patients (e.g. by severity of
4. ments. However the measures of asthma) or under what circumstances mon
5. avoidance were less stringent than those of itoring of PEFR will be effective.