About the Authors

Anke Lenferink

a.lenferink@mst.nl

Affiliations Department of Pulmonary Medicine, Medisch Spectrum Twente, Enschede, The Netherlands, Department of Research Methodology, Measurement, and Data-Analysis, Faculty of Behavioural, Management and Social sciences, University of Twente, Enschede, The Netherlands, School of Medicine, Flinders University, Adelaide, South Australia, Australia

Tanja Effing

Affiliations School of Medicine, Flinders University, Adelaide, South Australia, Australia, Department of Respiratory Medicine, Repatriation General Hospital, Adelaide, South Australia, Australia

Peter Harvey

Affiliation Flinders Human Behaviour and Health Research Unit, Flinders University, Adelaide, Australia

Malcolm Battersby

Affiliation Flinders Human Behaviour and Health Research Unit, Flinders University, Adelaide, Australia

Peter Frith

Affiliations School of Medicine, Flinders University, Adelaide, South Australia, Australia, Department of Respiratory Medicine, Repatriation General Hospital, Adelaide, South Australia, Australia

Wendy van Beurden

Affiliation Department of Pulmonary Medicine, Medisch Spectrum Twente, Enschede, The Netherlands

Job van der Palen

Affiliations Department of Pulmonary Medicine, Medisch Spectrum Twente, Enschede, The Netherlands, Department of Research Methodology, Measurement, and Data-Analysis, Faculty of Behavioural, Management and Social sciences, University of Twente, Enschede, The Netherlands

Muirne C. S. Paap

Affiliation Centre for Educational Measurement at the University of Oslo (CEMO), Faculty of Educational Sciences, University of Oslo, Oslo, Norway

Competing Interests

The authors have read the journal's policy and have the following competing interests: PH and MB have competing interests as the developers of PIH, but both have no personal financial interests. The other authors have declared that no competing interests exist. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceptualization: AL TE PH MB PF JP MP. Data curation: AL. Formal analysis: AL MP. Funding acquisition: TE JP. Investigation: AL TE PH MB PF WB JP MP. Methodology: AL TE JP MP. Project administration: AL TE JP. Resources: AL WB. Supervision: TE JP MP. Validation: AL MP. Writing – original draft: AL TE PH MB PF WB JP MP. Writing – review & editing: AL TE PH MB PF WB JP MP.