About the Authors

Karlijn Jojanneke Nijmeijer

nijmeijer@bmg.eur.nl

Affiliations Institute of Health Policy and Management, Erasmus University Rotterdam, P.O. Box 1738, 3000 DR Rotterdam, The Netherlands, The Rotterdam Eye Hospital, P.O. Box 70030, 3000 LM Rotterdam, The Netherlands

Isabelle Natalina Fabbricotti

Affiliation Institute of Health Policy and Management, Erasmus University Rotterdam, P.O. Box 1738, 3000 DR Rotterdam, The Netherlands

Robbert Huijsman

Affiliation Institute of Health Policy and Management, Erasmus University Rotterdam, P.O. Box 1738, 3000 DR Rotterdam, The Netherlands

Competing Interests

The first author is employed part time by The Rotterdam Eye Hospital. This hospital is the full shareholder of one of the three franchise systems that was used as a case in the qualitative part of study. Other individuals in the hospital did not have a role in the analysis and interpretation of the data, the writing of the paper, or in the decision to submit the manuscript for publication. The other authors declare that they have no competing interests. The authors confirm that the declared competing interests do not alter their adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: KJN INF RH. Performed the experiments: KJN. Analyzed the data: KJN INF RH. Wrote the paper: KJN INF RH.