Mark Greene talks about male suicide resulting from Man Box norms all the time right here on Medium - often citing all sorts of other mainstream research on the topic. Hell, I talk about it quite a bit as well - again based on all I hear about it while I'm researching and gathering info about the sociology of our culture and how patriarchal "traditional" masculinty harms us all.

Making the Connections: Harmful Masculine Norms and Suicide | Equimundo

Expressions of masculinity and associations with suicidal ideation among young males

What's in the "man box?" Increased violence & suicidal thoughts | Today's Research by Fortinberry…