About the Authors

Titia F. Beek

t.beek@vumc.nl (TFB); b.kreukels@vumc.nl (BPCK)

Affiliation Department of Medical Psychology & Center of Expertise on Gender Dysphoria, VU University Medical Center, Amsterdam, The Netherlands

Peggy T. Cohen-Kettenis

Affiliation Department of Medical Psychology & Center of Expertise on Gender Dysphoria, VU University Medical Center, Amsterdam, The Netherlands

Walter P. Bouman

Affiliation Nottingham Centre for Gender Dysphoria, Nottingham, United Kingdom

Annelou L. C. de Vries

Affiliation Department of Medical Psychology & Center of Expertise on Gender Dysphoria, VU University Medical Center, Amsterdam, The Netherlands

Thomas D. Steensma

Affiliation Department of Medical Psychology & Center of Expertise on Gender Dysphoria, VU University Medical Center, Amsterdam, The Netherlands

Gemma L. Witcomb

Affiliation School of Sport, Exercise, and Health Sciences, Loughborough University, Loughborough, United Kingdom

Jon Arcelus

Affiliations Nottingham Centre for Gender Dysphoria, Nottingham, United Kingdom, Division of Psychiatry and Applied Psychology, Faculty of Medicine & Health Sciences, University of Nottingham, Nottingham, United Kingdom

Christina Richards

Affiliation Nottingham Centre for Gender Dysphoria, Nottingham, United Kingdom

Els Elaut

Affiliation Center for Sexology and Gender Problems, Ghent University Hospital, Ghent, Belgium

Baudewijntje P. C. Kreukels

t.beek@vumc.nl (TFB); b.kreukels@vumc.nl (BPCK)

Affiliation Department of Medical Psychology & Center of Expertise on Gender Dysphoria, VU University Medical Center, Amsterdam, The Netherlands

Competing Interests

I have read the journal's policy and the authors of this manuscript have the following competing interests: Professor Peggy Cohen-Kettenis is a member of the Working Group on the Classification of Sexual Disorders and Sexual Health (WGSDSH) of the World Health Organization. The WGSDSH has developed the diagnostic criteria for Gender Incongruence and advised regarding its placement in the ICD-11. This does not alter our adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: TFB PTCK ALCV TDS WPB GLW JA CR BPCK. Performed the experiments: TFB ALCV TDS GLW BPCK. Analyzed the data: TFB GLW JA BPCK. Contributed reagents/materials/analysis tools: TFB PTCK ALCV TDS WPB GLW JA CR BPCK. Wrote the paper: TFB PTCK ALCV TDS WPB GLW JA CR EE BPCK. Interpretation of data: TFB PTCK ALCV TDS WPB GLW JA CR EE BPCK.