Cragg Liza, Williams Siân, van der Molen Thys, Thomas Mike, Correia de Sousa Jaime, Chavannes Niels H
International Primary Care Respiratory Group, Edinburgh, UK.
Department of General Practice, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
NPJ Prim Care Respir Med. 2016 Sep 22;26:16048. doi: 10.1038/npjpcrm.2016.48.