Reciprocal affiliation among adolescent rats during a mild group stressor predicts mammary tumors and lifespan.
Yee JR, Cavigelli SA, Delgado B, McClintock MK. Reciprocal affiliation among adolescent rats during a mild group stressor predicts mammary tumors and lifespan. Psychosom Med. 2008 Nov; 70(9):1050-9.