About the Authors

Dawn M. Guthrie

Contributed equally to this work with: Dawn M. Guthrie, Anja Declercq, Harriet Finne-Soveri, Brant E. Fries, John P. Hirdes

dguthrie@wlu.ca

Affiliation Department of Kinesiology & Physical Education and Department of Health Sciences, Wilfrid Laurier University, Waterloo, Ontario, Canada

Anja Declercq

Contributed equally to this work with: Dawn M. Guthrie, Anja Declercq, Harriet Finne-Soveri, Brant E. Fries, John P. Hirdes

Affiliation Katholieke Universiteit Leuven (Dutch), Brussels, Belgium

Harriet Finne-Soveri

Contributed equally to this work with: Dawn M. Guthrie, Anja Declercq, Harriet Finne-Soveri, Brant E. Fries, John P. Hirdes

Affiliation National Institute for Health and Welfare, Ageing and Services Unit, Helsinki, Finland

Brant E. Fries

Contributed equally to this work with: Dawn M. Guthrie, Anja Declercq, Harriet Finne-Soveri, Brant E. Fries, John P. Hirdes

Affiliations Institute of Gerontology, University of Michigan, Ann Arbor, Michigan, United States of America, Health Systems Research and Geriatric Research, Education, and Clinical Center, Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, Michigan, United States of America

John P. Hirdes

Contributed equally to this work with: Dawn M. Guthrie, Anja Declercq, Harriet Finne-Soveri, Brant E. Fries, John P. Hirdes

Affiliation School of Public Health and Health Systems, University of Waterloo, Waterloo, Ontario, Canada

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: DMG AD HFS BEF JPH. Performed the experiments: DMG AD HFS BEF JPH. Analyzed the data: DMG AD HFS BEF JPH. Contributed reagents/materials/analysis tools: DMG AD HFS BEF JPH. Wrote the paper: DMG AD HFS BEF JPH.