Nocturnal temperature controlled laminar airflow for treating atopic asthma: a randomised controlled trial
Objective To determine whether environmental control using nocturnal temperature controlled laminar airflow (TLA) treatment could improve the quality of life of patients with persistent atopic asthma. Design Randomised, double-blind, placebo-controlled, parallel-group trial. Setting Nineteen European asthma clinics. Participants 312 patients aged 7-70 with inadequately controlled persistent atopic