title: Interchange of "altruistic" acts as an epiphenomenon.
authors.forename: C K
authors.initials: CK
authors.lastname: Hemelrijk
mesh_terms: D000533:Altruism; D000818:Animals; D002522:Chlorocebus aethiops / Q000523:psychology; D006120:Grooming / Q000502:physiology*; D008960:Models, Psychological