title: [Thinking outside the box -- simply laugh: the World Laughter Day].
authors.forename: Johannes
authors.initials: J
authors.lastname: Weiß
mesh_terms: D005858:Germany; D006801:Humans; D007391:International Cooperation; D007845:Laughter; D027641:Laughter Therapy / Q000379:methods* / Q000639:trends*; D016896:Treatment Outcome