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. 2020 Jun 30;10:10627. doi: 10.1038/s41598-020-67462-z

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Flowchart showing participants in the study. ^a27,892 refused in the very beginning of the phone call. ^bMainly after removal of duplicated interviews or excess numbers in certain sample strata. ^cNone of the 70 missing subjects had reported a previous diagnosis of SS or Sicca syndrome. ^dOnly 50% (10/20) of these cases had already been diagnosed with SS prior to the EPISER2016 study.