Laughter as medicine: A systematic review and meta-analysis of interventional studies evaluating the impact of spontaneous laughter on cortisol levels

• Caroline Kaercher Kramer ,

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

  * E-mail: Caroline.Kramer@sinaihealth.ca

  Affiliations Division of Endocrinology, University of Toronto, Toronto, Canada, Leadership Sinai Centre for Diabetes, Mount Sinai Hospital, Toronto, Canada, Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Canada

  https://orcid.org/0000-0003-1064-0100

  ⨯
• Cristiane Bauermann Leitao

  Roles Investigation, Methodology, Validation, Writing – review & editing

  Affiliations Division of Endocrinology, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil, Post-graduate Program in Medical Sciences: Endocrinology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil

  ⨯