Randomized, Double-Blind Comparison of Advair 100/50 BID vs Salmeterol BID vs Albuterol QID in Subjects With ARG/ARG Genotype 12 Years of Age and Older With Presistent Asthma on Short-Acting Beta2-Agonists Alone

This study may last up to 36-38 weeks. Patients will visit the clinic 11 times. A blood sample will be taken at Visit 1 to look at subjects' genes. Breathing tests will be done during the study. Study medicines and procedures will be provided at no cost. Patients will be treated with VENTOLIN (8 wks), ATROVENT (8 wks), then ADVAIR or SEREVENT (16 wks). ADVAIR and SEREVENT are FDA approved for the treatment of asthma in patients 4 years of age and older.