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. 2020 Feb 26;21:227. doi: 10.1186/s13063-020-4098-5

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© The Author(s). 2020

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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 Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 2 — Virtual reality setting. (A) VR environment. The upper line of the Fig. 1 shows the VR-AAT avoidance condition, the bottom line (2) shows the VR-AAT placebo condition. (B) Thumb-up gesture to start the training. (C) Participants’ view of a smoking-related item (here: cigarette). (D) Participant equipped with the HTC Vive head-mounted display and interacting with a smoking-related VR item: (1) pushing a cigarette in the VR-AAT avoidance condition vs. (2) sorting a cigarette to the right in the VR-AAT placebo condition. (E) Participant interacting with a smoking-unrelated VR item: (1) grasping a toothbrush in the VR-avoidance condition vs. (2) sorting a toothbrush to the left in the VR-placebo condition.