Figure 2. Daily means of serial PEF measurements: periods away from work and periods of work. The patient is a 40-year-old man who had been a carpenter for approximately 21 years. He presented with a 3-year history of progressive rhinitis, dry cough, wheezing, and dyspnea, with attacks. He reported multiple emergency department visits, as well as symptom improvement during periods away from work and with the use of bronchodilators.