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. 2021 Mar 19;9:638430. doi: 10.3389/fpubh.2021.638430

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Copyright © 2021 Xu, Lin, Spada, Zhao, Wang, Chen, Chen, Zhang, Marraro, Zeng, Ye, Zhang and Zeng.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The distributions of scores on knowledge, attitude, and practice manifested by 3D scatter. X axis represents the scores of knowledge, Y axis represents the scores of attitudes, and Z axis represents the scores of practices.