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de Graaf, N.M., Giovanardi, G., Zitz, C. et al. Sex Ratio in Children and Adolescents Referred to the Gender Identity Development Service in the UK (2009–2016). Arch Sex Behav 47, 1301–1304 (2018). https://doi.org/10.1007/s10508-018-1204-9
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DOI: https://doi.org/10.1007/s10508-018-1204-9