Positive affect and markers of inflammation: discrete positive emotions predict lower levels of inflammatory cytokines
Emotion (2015) - Comment
pubmed: 25603133  doi: 10.1037/emo0000033  issn: 1931-1516  issn: 1528-3542 

Jennifer E. Stellar, Neha John-Henderson, Craig L. Anderson, Amie M. Gordon, Galen D. McNeil, Dacher Keltner