About the Authors

Titia F. Beek

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

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

Peggy T. Cohen-Kettenis

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

Walter P. Bouman

Affiliation Nottingham Centre for Gender Dysphoria, Nottingham, United Kingdom

Annelou L. C. de Vries

Affiliations Center of Expertise on Gender Dysphoria, VU University Medical Center, Amsterdam, The Netherlands, Department of Child and Adolescent Psychiatry, VU University Medical Center, Amsterdam, The Netherlands

Thomas D. Steensma

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

Griet De Cuypere

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

Baudewijntje P. C. Kreukels

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

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

Conceptualization: TFB PTCK ALCdV TDS BPCK. Formal analysis: TFB GLW BPCK. Funding acquisition: ALCdV TDS BPCK WPB. Investigation: TFB GLW. Methodology: TFB PTCK WPB ALCdV TDS GLW JA CR BPCK. Project administration: BPCK WPB. Supervision: BPCK WPB. Writing – original draft: TFB PTCK ALCdV TDS BPCK. Writing – review & editing: TFB PTCK WPB ALCdV TDS GLW JA CR GDC BPCK.