The study linked at the beginning of this article, and the two listed under "More information" at the bottom all take me to a page with the error "DOI Not Foun

The study linked at the beginning of this article, and the two listed under "More information" at the bottom all take me to a page with the error "DOI Not Found" Given that the main (only significant) fact cited in the article goes against everything else I've read, I would like to see the actual study and how it came to the conclusion that the number of close friends has doubled. Here are some sources that appear to contradict this article: https://www.americansurveycenter.org/research/the-state-of-american-friendship-change-challenges-and-loss/ https://www.americansurveycenter.org/research/the-state-of-a... https://www150.statcan.gc.ca/n1/daily-quotidien/250617/dq250617d-eng.htm https://www150.statcan.gc.ca/n1/daily-quotidien/250617/dq250... https://pmc.ncbi.nlm.nih.gov/articles/PMC11288408/#pone.0305834.ref015 https://pmc.ncbi.nlm.nih.gov/articles/PMC11288408/#pone.0305...