About the Authors

John Gatfield

john.gatfield@actelion.com

Affiliation Actelion Pharmaceuticals Ltd., Allschwil, Switzerland

Celia Mueller Grandjean

Affiliation Actelion Pharmaceuticals Ltd., Allschwil, Switzerland

Daniel Bur

Affiliation Actelion Pharmaceuticals Ltd., Allschwil, Switzerland

Martin H. Bolli

Affiliation Actelion Pharmaceuticals Ltd., Allschwil, Switzerland

Oliver Nayler

Affiliation Actelion Pharmaceuticals Ltd., Allschwil, Switzerland

Competing Interests

All authors are employees and shareholders of the funder, Actelion Pharmaceuticals Ltd. Bosentan and macitentan are marketed products of Actelion Pharmaceuticals Ltd, and both compounds are under protection by patents licensed in or held by Actelion Pharmaceuticals Ltd (bosentan: patent family corresponding to EP 526708 (F. Hoffmann-La Roche AG); macitentan: patent family corresponding to WO 02/053557 (Actelion Pharmaceuticals Ltd)). This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: JG DB MB CMG. Performed the experiments: CMG MB DB. Analyzed the data: CMG JG MB ON DB. Wrote the paper: JG DB ON MB.