“…The characteristics of the included studies are illustrated in Table 1. These studies were published between 2005 and 2020 and were from the Iraq (Abu‐Raghif, Ali, Farhood, Hameed, & Sahib, 2013; Aziz, Hussain, Mahwi, & Ahmed, 2018; Ismael & Othman, 2013; Thanoon, Abdul‐Jabbar, & Taha, 2012), China (Aishuang, Wang, Zhao, & Wang, 2014; Chun‐pu, 2010; Fang et al, 2018; Huang, Li, & Liu, 2008; P. Li, 2012; X. X. Li, Liu, Zhuang, Guo, & Pang, 2020; Wang, Qin, Xu, & Xu, 2017; Wu, Huang, & Wang, 2012; Xia et al, 2020; Yun et al, 2005; ZhiQiang, XiaoLi, & YunFen, 2012; Jianhui, 2011) and Korea (Kim et al, 2005) with 567 participants in the GB group and 537 in the control group. All studies were performed on both genders.…”