Use of the Asthma Control Questionnaire by the Asthma Clinical Research Network

To the Editors:

In our original report previously published in the European Respiratory Journal (ERJ) [1], the Asthma Clinical Research Network (ACRN) utilised an unauthorised modified version of the Asthma Control Questionnaire (ACQ)^# administered over the telephone to demonstrate that the severity of a cold measured within the first 2 days was a predictor of subsequent worsening of asthma control. We subsequently …