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1. Preferred Reporting Items for Systematic Reviews and Meta-Analyses: The PRISMA Statement

2. Increased depressive and anxiety symptoms in non-heterosexual individuals: Moderation by childhood factors using a twin design

3. Personality and Sexual Orientation: New Data and Meta-analysis

4. Mental Healthcare Usage of Transgender Youth Before and After Affirming Treatment

5. Large-scale GWAS reveals insights into the genetic architecture of same-sex sexual behavior

6. Wikipedia Bibliography:

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   2. PubMed

   3. PsycINFO

   4. Web of Science

   5. https://en.wikipedia.org/wiki/Cochrane_Library  :

      https://en.wikipedia.org/wiki/Cochrane_Library

   6. ProQuest

   7. Confidence interval

   8. https://en.wikipedia.org/wiki/Meta-regressions  :

      https://en.wikipedia.org/wiki/Meta-regressions

   9. Meta-regression