4American Thorcic Society. Standards for the diagnosis,and care of patients with chronic obstructive pulmonary disease. Am J Respir Crit Care Med, 1995,152: 78 - 83.
5Corren J. The impact of allergic rhinitis on bronchial asthma. J Allergy Clin Jmmunol, 1998,101 : 352 - 356.