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. 2018 Oct 27;8(10):e018539. doi: 10.1136/bmjopen-2017-018539

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© Author(s) (or their employer(s)) 2018. Re-use permitted under CC BY. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution 4.0 Unported (CC BY 4.0) license, which permits others to copy, redistribute, remix, transform and build upon this work for any purpose, provided the original work is properly cited, a link to the licence is given, and indication of whether changes were made. See: https://creativecommons.org/licenses/by/4.0/.

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Flow chart of the European Prospective Investigation of Cancer-Norfolk (EPIC-Norfolk) cohort. This is a flow chart showing the number of participants at each study stage: the number approached to participate in the EPIC-Norfolk study, the number enrolled at baseline who completed the HLQ, those who completed the psychosocial HLEQ, and finally, respondents with complete data on covariates. The EPIC-Norfolk study consists of middle-aged and older British people. GAD, generalised anxiety disorder; HLEQ, Health and Life Experiences Questionnaire; MDD, major depressive disorder.