2.1. Research design

HL Huan Liu
AD Aiping Du
YT Yongming Tian
MG Mingrong Gao
SJ Shuming Ji
JM Jie Mi
XS Xiaoping Shao
DH Debin Huang
XC Xiaoyi Cao
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A cross‐sectional descriptive design was used in this study.

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