https://www.theguardian.com/lifeandstyle/2010/jul/04/divorce-friends-contagious-academic-study
https://www.psychologytoday.com/us/blog/contemplating-divorce/201007/is-divorce-contagious-what-study-doesnt-tell-us
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3990282/