Allergy Research Center;
Shiraz University of Medical Sciences;
Shiraz;
Iran;
Department of Epidemiology;
Shiraz University of Medical Sciences;
Shiraz;
Iran;
Department of Immunology;
Shiraz University of Medical Sciences;
Shiraz;
Iran;
Specific Center of Occupational Medicine;
Shiraz University of Medical Sciences;
Shiraz;
Iran;
ozone; sulfur dioxide; carbon monoxide; Air pollution; Iran; nitrogen dioxide; asthma attack; particulate matter;