About the Authors
- Nees Jan van Eck
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* E-mail: ecknjpvan@cwts.leidenuniv.nl
Affiliation Centre for Science and Technology Studies, Leiden University, Leiden, The Netherlands
- Ludo Waltman
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Affiliation Centre for Science and Technology Studies, Leiden University, Leiden, The Netherlands
- Anthony F. J. van Raan
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Affiliation Centre for Science and Technology Studies, Leiden University, Leiden, The Netherlands
- Robert J. M. Klautz
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Affiliation Department of Cardiothoracic Surgery, Leiden University Medical Center, Leiden, The Netherlands
- Wilco C. Peul
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Affiliation Department of Neurosurgery, Leiden University Medical Center, Leiden, The Netherlands
Competing Interests
Nees Jan van Eck, Ludo Waltman, and Anthony F. J. van Raan are affiliated with the Centre for Science and Technology Studies of Leiden University, which has commercial interests in the production of bibliometric indicators. 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: NJE LW. Performed the experiments: NJE LW. Analyzed the data: AFJR RJMK WCP. Contributed reagents/materials/analysis tools: NJE LW. Wrote the paper: NJE LW AFJR RJMK WCP.