No citations exist. My comment was directed at the grandparent whose original symptoms warranted taking dangerous MAOIs. In that case, I would consider an off literature treatment to fix the vitamin D deficiency as fast as possible. Tanning beds are carcinogenic and not recommended for general health.
I started taking MAOIs while trying to deal with depression. SSRIs had pretty severe cognitive side-effects for me, and low doses of transdermal MAOIs have a better risk profile than traditional oral MAOIs. You're right about dangerous, though. I first started modafinil while on the MAOI, and didn't find out that it didn't work for me off of it until I stopped using the MAOI due to apparent serotonin toxicity, which you don't want to screw around with.