METHODS	After a 4-week run-in , patients with mild asthma were randomly assigned to receive one of four inhaled treatments : placebo twice daily plus 250 microg of beclomethasone and 100 microg of albuterol in a single inhaler as needed ( as-needed combination therapy ) ; placebo twice daily plus 100 microg of albuterol as needed ( as-needed albuterol therapy ) ; 250 microg of beclomethasone twice daily and 100 microg of albuterol as needed ( regular beclomethasone therapy ) ; or 250 microg of beclomethasone and 100 microg of albuterol in a single inhaler twice daily plus 100 microg of albuterol as needed ( regular combination therapy ) .\