This whole area is confusing, understudied, and messy.

I attach some of the references I used for this area. Never was the term ‘better research is needed’ more fitting….

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4140701/

https://www.karger.com/Article/FullText/370338

http://www.thelancet.com/journals/lancet/article/PIIS0140-6736(05)72262-5/fulltext

https://pdfs.semanticscholar.org/7498/9759b62841d088b4b0afc45564aa48e03af7.pdf?_ga=2.238076672.1267186742.1520784025-1252960857.1520784025

.https://nordic.cochrane.org/sites/nordic.cochrane.org/files/public/uploads/theses/Nielsen%20PhD.pdf
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3627130/

http://www.psychiatrist.com/jcp/article/Pages/2005/v66n10/v66n1015.aspx

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3627130/