An organically growing list! Check back for further exploration.
Massage:
http://time.com/4728672/massage-low-back-pain/
http://www6.miami.edu/touch-research/AdultMassage.html
MettaWing:
http://www.nationalgeographic.com/magazine/2016/12/healing-science-belief-placebo/
http://discovermagazine.com/2013/may/13-grandmas-experiences-leave-epigenetic-mark-on-your-genes