supplementary material to a document supplementary material of a published study based on dietary survey(s) Lachat C, Hawwash D, Ocké MC, Berg C, Forsum E, Hörnell A, Larsson C, Sonestedt E, Wirfält E, Åkesson A, Kolsteren P, Byrnes G, De Keyzer W, Van Camp J, Cade JE, Slimani N, Cevallos M, Egger M, Huybrechts I. Strengthening the Reporting of Observational Studies in Epidemiology-Nutritional Epidemiology (STROBE-nut): An Extension of the STROBE Statement. PLoS Med. 2016 Jun 7;13(6):e1002036. doi: 10.1371/journal.pmed.1002036. a supplementary (online) material that provides data collection tools and data as online material or explain how they can be accessed.