About the Authors

Hilary Siddall

Roles Data curation, Formal analysis, Methodology, Resources, Supervision, Visualization, Writing – review & editing

hilary.x.siddall@gsk.com

Affiliation Research and development, GSK, Stevenage, Hertfordshire, United Kingdom

Diana Quint

Roles Conceptualization, Data curation, Methodology, Resources, Visualization, Writing – review & editing

Affiliation Respiratory Therapeutic Area, GSK, Stevenage, Hertfordshire, United Kingdom

Hitesh Pandya

Roles Formal analysis, Investigation, Supervision, Validation, Visualization, Writing – review & editing

Current address: Department of Respiratory Sciences, Glenfield Hospital, Leicester, England

Affiliation Respiratory Therapeutic Area, GSK, Stevenage, Hertfordshire, United Kingdom

Will Powley

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Software, Visualization, Writing – review & editing

Affiliation Biostatistics, GSK, Stevenage, Hertfordshire, United Kingdom

Shaila Shabbir

Roles Investigation, Project administration, Supervision, Writing – review & editing

Affiliation Immuno-Inflammation Global Clinical Sciences & Delivery, GSK, Stevenage, Hertfordshire, United Kingdom

Jens M. Hohlfeld

Roles Investigation, Methodology, Project administration, Resources, Supervision, Writing – review & editing

Affiliations Airway Research, Fraunhofer Institute for Toxicology and Experimental Medicine (ITEM), Hannover, Germany, Member of the German Center for Lung Research, Hannover, Germany, Department of Respiratory Medicine, Hannover Medical School, Hannover, Germany

Dave Singh

Roles Conceptualization, Investigation, Methodology, Project administration, Supervision, Visualization, Writing – review & editing

Affiliation Respiratory, Medicines Evaluation Unit, Manchester, United Kingdom

Laurie Lee

Roles Conceptualization, Formal analysis, Investigation, Methodology, Visualization, Writing – review & editing

Affiliation Clinical development, GSK, Philadelphia, Pennsylvania, United States of America

Competing Interests

HS, WP, and SS are employees of GSK and hold shareholder status in the company. DQ, HP and LL were employees of GSK and held shareholder status at the time of study conduct. JMH’s institution received funding from GSK for study conduct. DS has received sponsorship to attend international meetings, honoraria for lecturing or attending advisory boards from AstraZeneca, Boehringer Ingelheim, Chiesi, Cipla, Genentech, GlaxoSmithKline, Glenmark, Menarini, Mundipharma, Novartis, Peptinnovate, Pfizer, Pulmatrix, Therevance and Verona. This does not alter our adherence to PLOS ONE policies on sharing data and materials.