https://annals-general-psychiatry.biomedcentral.com/articles/10.1186/s12991-015-0089-4
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https://annals-general-psychiatry.biomedcentral.com/articles/10.1186/s12991-016-0090-6
https://annals-general-psychiatry.biomedcentral.com/articles/10.1186/s12991-016-0091-5
https://annals-general-psychiatry.biomedcentral.com/articles/10.1186/s12991-015-0084-9