About the Authors

Vanessa C. Delisle

Affiliations Department of Psychiatry, McGill University, Montréal, Québec, Canada, Department of Psychiatry, Jewish General Hospital, Montréal, Québec, Canada

Aaron T. Beck

Affiliation Department of Psychiatry, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America

Keith S. Dobson

Affiliation Department of Psychology, University of Calgary, Calgary, Alberta, Canada

David J. A. Dozois

Affiliation Department of Psychology, University of Western Ontario, London, Ontario, Canada

Brett D. Thombs

brett.thombs@mcgill.ca

Affiliations Department of Psychiatry, McGill University, Montréal, Québec, Canada, Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montréal, Québec, Canada, Department of Medicine, McGill University, Montréal, Québec, Canada, School of Nursing, McGill University, Montréal, Québec, Canada, Department of Psychiatry, Jewish General Hospital, Montréal, Québec, Canada

Competing Interests

Aaron T. Beck is the author of the Beck Depression Inventory, currently published by the Psychological Corporation. The remaining authors have declared that no competing interests exist. This does not alter the authors′ adherence to all the PLoS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: VCD ATB KSD DJAD BDT. Performed the experiments: ATB KSD DJAD. Analyzed the data: VCD BDT. Contributed reagents/materials/analysis tools: VCD ATB KSD DJAD BDT. Wrote the paper: VCD BDT.