About the Authors
- Y. H. M. Krul-Poel
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Roles Formal analysis, Methodology, Writing – original draft
* E-mail: s.simsek@nwz.nl (SS); y.krul@vumc.nl (YKP)
Affiliation Department of Internal Medicine/Endocrinology, VU University Medical Center, Amsterdam, The Netherlands
- P. P. Koenders
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Roles Formal analysis, Writing – review & editing
Affiliation Department of Internal Medicine, Medical Center Alkmaar, Alkmaar, The Netherlands
- R. P. Steegers-Theunissen
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Roles Funding acquisition, Writing – review & editing
Affiliations Department of Pediatrics, Division of Neonatology, Erasmus MC, University Medical Center, Rotterdam, The Netherlands, Department of Obstetrics and Gynecology, Erasmus MC, University Medical Center, Rotterdam, The Netherlands
- E. ten Boekel
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Roles Writing – review & editing
Affiliation Department of Clinical Chemistry, Hematology & Immunology, Medical Center Alkmaar, Alkmaar, The Netherlands
- M. M. ter Wee
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Roles Methodology, Writing – review & editing
Affiliation Department of Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, the Netherlands
- Y. Louwers
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Roles Writing – review & editing
Affiliation Department of Obstetrics and Gynecology, Erasmus MC, University Medical Center, Rotterdam, The Netherlands
- P. Lips
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Roles Writing – review & editing
Affiliation Department of Internal Medicine/Endocrinology, VU University Medical Center, Amsterdam, The Netherlands
- J. S. E. Laven
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Contributed equally to this work with: J. S. E. Laven, S. Simsek
Roles Conceptualization, Funding acquisition, Methodology, Writing – review & editing
Affiliation Division of Reproductive Medicine, Department of Obstetrics, Gynecology, Erasmus Medical Center Rotterdam, The Netherlands
- S. Simsek
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Contributed equally to this work with: J. S. E. Laven, S. Simsek
Roles Conceptualization, Funding acquisition, Methodology, Supervision, Writing – review & editing
* E-mail: s.simsek@nwz.nl (SS); y.krul@vumc.nl (YKP)
Affiliations Department of Internal Medicine/Endocrinology, VU University Medical Center, Amsterdam, The Netherlands, Department of Internal Medicine, Medical Center Alkmaar, Alkmaar, The Netherlands
Competing Interests
JSE has received research grants from the following pharmaceutical companies (in alphabetical order): Ferring, Merck Serono, Merck Sharpe and Dome, Organon, Shering Plough and Serono. This does not alter our adherence to PLOS ONE policies on sharing data and materials.