About the Authors

Roland R. Griffiths

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

rgriff@jhmi.edu

Affiliations Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Nathan Shock Drive, Baltimore, Maryland, United States of America, Department of Neuroscience, Johns Hopkins University School of Medicine, Nathan Shock Drive, Baltimore, Maryland, United States of America

Ethan S. Hurwitz

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

Affiliations Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Nathan Shock Drive, Baltimore, Maryland, United States of America, Department of Psychology, University of California San Diego, Gilman Drive, San Diego, California, United States of America

Alan K. Davis

Roles Formal analysis, Writing – original draft, Writing – review & editing

Affiliation Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Nathan Shock Drive, Baltimore, Maryland, United States of America

Matthew W. Johnson

Roles Writing – review & editing

Affiliation Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Nathan Shock Drive, Baltimore, Maryland, United States of America

Robert Jesse

Roles Conceptualization, Methodology, Writing – review & editing

Affiliation Council on Spiritual Practices, Occidental, California, United States of America

Competing Interests

Roland Griffiths is on the Board of Directors of the Heffter Research Institute and Robert Jesse is convener of the Council on Spiritual Practices. This does not alter our adherence to PLOS ONE policies on sharing data and materials.