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Article History

Received: 16 November 2020

Accepted: 25 March 2021

First Online: 9 April 2021

Declarations

:

: The Regional Ethical Review Board at Umeå University approved the ETICS study (Dnr 04-156M), the adult coeliac disease survey (Dnr 09-053M), and the coeliac disease register (Dnr 97-370). Written informed consent for children in the ETICS study was given by a legal guardian. We invited people to the adult coeliac disease survey by sending them a questionnaire with an accompanying letter. Participants consented to participate in the study when they returned their questionnaires (without explicitly responding to a question). For the current study, the coeliac disease register was used to calculate the incidence of coeliac disease for which no informed consent is required. One of the authors (Anneli Ivarsson) is principal investigator for the studies from which datasets used for supplementary analyses in current study were used. Supplementary analyses were performed from the ETICS study and the adult coeliac disease survey by the corresponding author, who handle study data for these studies, and therefore no additional administrative permission was required for these analyses. Analyses from the coeliac disease register were performed only on aggregated data created for another study [], and therefore the current study did not require study data.

: Not applicable.

: The authors declare that they have no competing interests.