Author_Response_1 – Supplemental material for Impact of baseline COPD symptom severity on the benefit from dual versus mono-bronchodilators: an analysis of the EMAX randomised controlled trial

Supplemental material, Author_Response_1 for Impact of baseline COPD symptom severity on the benefit from dual versus mono-bronchodilators: an analysis of the EMAX randomised controlled trial by Claus F. Vogelmeier, Edward M. Kerwin, Leif H. Bjermer, Lee Tombs, Paul W. Jones, Isabelle H. Boucot, Ian P. Naya, David A. Lipson, Chris Compton, Neil Barnes and François Maltais in Therapeutic Advances in Respiratory Disease