It's well known that trauma plays a part, but it is obviously not the whole story.
Twin studies: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4623659/ https://www.ncbi.nlm.nih.gov/pubmed/21336711
It's well known that trauma plays a part, but it is obviously not the whole story.
Twin studies: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4623659/ https://www.ncbi.nlm.nih.gov/pubmed/21336711