About the Authors

Ahmed A. Ismail

Affiliations Department of Occupational and Environmental Health, College of Public Health, University of Iowa, Iowa City, Iowa, United States of America, Community Medicine and Public Health Department, Faculty of Medicine, Menoufia University, Shebin El-Kom, Egypt

Matthew R. Bonner

Affiliation Department of Epidemiology and Environmental Health, State University of New York, Buffalo, New York, United States of America

Olfat Hendy

Affiliation Department of Clinical Pathology, National Liver Institute, Menoufia University, Shebin El-Kom, Egypt

Gaafar Abdel Rasoul

Affiliation Community Medicine and Public Health Department, Faculty of Medicine, Menoufia University, Shebin El-Kom, Egypt

Kai Wang

Affiliation Department of Biostatistics, College of Public Health, University of Iowa, Iowa City, Iowa, United States of America

James R. Olson

Affiliations Department of Epidemiology and Environmental Health, State University of New York, Buffalo, New York, United States of America, Department of Pharmacology and Toxicology, State University of New York, Buffalo, New York, United States of America

Diane S. Rohlman

diane-rohlman@uiowa.edu

Affiliations Department of Occupational and Environmental Health, College of Public Health, University of Iowa, Iowa City, Iowa, United States of America, Oregon Institute for Occupational Health Sciences, Oregon Health & Science University, Portland, Oregon, United States of America

Competing Interests

Oregon Health and Science University and Dr. Rohlman have a significant financial interest in Northwest Education Training and Assessment, LLC, a company that may have a commercial interest in the results of this research and technology. This potential conflict of interest was reviewed by the University of Iowa and Oregon Health and Science University and an approved Conflict of Interest in research management plan was implemented. This does not alter our adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceptualization: AI MB JO DR. Data curation: AI KW DR. Formal analysis: AI KW. Funding acquisition: DR. Investigation: AI MB OH GA JO DR. Methodology: AI MB JO DR. Project administration: AI GA DR. Resources: JO OH GA DR. Supervision: AI MB OH GA JO DR. Validation: AI MB JO DR. Visualization: AI MB JO DR. Writing – original draft: AI DR. Writing – review & editing: AI MB JO DR.