About the Authors

Jiangwei Sun

Roles Formal analysis, Funding acquisition, Methodology, Software, Writing – original draft, Writing – review & editing

jiangwei.sun@ki.se

Affiliation Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden

Jonas F. Ludvigsson

Roles Writing – original draft, Writing – review & editing

Affiliations Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Department of Pediatrics, Örebro University Hospital, Örebro, Sweden, Department of Medicine, Columbia University College of Physicians and Surgeons, New York, New York, United States of America

Caroline Ingre

Roles Supervision, Writing – original draft, Writing – review & editing

Affiliation Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden

Fredrik Piehl

Roles Writing – original draft, Writing – review & editing

Affiliation Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden

Karin Wirdefeldt

Roles Writing – original draft, Writing – review & editing

Affiliations Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden

Ulrika Zagai

Roles Supervision, Writing – original draft, Writing – review & editing

Affiliation Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden

Weimin Ye

Roles Data curation, Investigation, Project administration, Resources, Writing – original draft, Writing – review & editing

Affiliation Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden

Fang Fang

Roles Conceptualization, Formal analysis, Funding acquisition, Methodology, Supervision, Writing – original draft, Writing – review & editing

Affiliation Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden

Competing Interests

I have read the journal’s policy and the authors of this manuscript have the following competing interests: JL coordinates a study (independent of the present study) on behalf of the Swedish IBD quality register (SWIBREG). That study has received funding from Janssen Corporation. Other authors declared no competing interests.