"Racemic Adrenaline and Inhalation Strategies in Acute Bronchiolitis" 
NEJM Jun 13
http://www.nejm.org/doi/full/10.1056/NEJMoa1301839 
"CONCLUSIONS

In the treatment of acute bronchiolitis in infants, inhaled racemic adrenaline is not more effective than inhaled saline. However, the strategy of inhalation on demand appears to be superior to that of inhalation on a fixed schedule. (Funded by Medicines for Children; ClinicalTrials.gov number, NCT00817466; EudraCT number, 2009-012667-34.)"