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. 2018 Jan 3;4(1):e1701130. doi: 10.1126/sciadv.1701130

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Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.

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Fig. 3 — The top three WorldCat subject labels are shown for each of the main communities. The color, shape, and bolded number correspond to the co-citation communities in the ≥3 systems thinking network in Fig. 2A. Numbers of co-cited documents within each community that have a topic label are reported.