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. 2019 Apr 2;9(4):e025633. doi: 10.1136/bmjopen-2018-025633

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© Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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Phase Two. Recruitment Flowchart for the Quantified Self ‘Blood Testers’ participant-led research project: Four employees of Quantified Self Labs and 35 prospective participants met at the Quantified Self 2017 Global Conference to propose and discuss the project. Emails were collected and follow-up surveys were sent to gauge interest. Responders confirmed their interest in participation and their goal for the project with an organiser from QS Labs. These individuals received equipment and subsequently attended online discussions to brainstorm risks and benefits of participation. In total, 21 participants completed the project. QS, Quantified Self.