“…The list of excluded articles together with the causes for their exclusion is provided in Appendix , Texts S2. A total of 196 eligible articles were used for systemic review and meta‐analysis (Abdalla, Majok, El Malik, & Ali, 2012; Abraham et al., 2005; Abubakar, Ali, & Khan, 2008; Abubakar, Jamal, Arshed, Hussain, & Ali, 2009; Abubakar, Jamal, Hussain, & Ali, 2008; Abubakar, Jamal, Khan, & Ali, 2008; Abubakar, Javed Arshed, Hussain, & Ali, 2011; Abubakar, Manzoor, et al, 2016; Abubakar, Rasool, et al, 2016; Abubakar, Zahur, Afzal, Ali, & Gonzales, 2017; Abubakar, Zahur, Naeem, Khan, & Qureshi, 2018; Acharya, Poudel, & Acharya, 2018; Adel, Abu‐Elzein, Al‐Naeem, & Amin, 2004; Adombi et al., 2017; Afera, Hussien, & Amsalu, 2014; Ahmad, Jamal, Ali, & Hussain, 2005; Ahmed et al., 2017; Ahmed, Rahman, Alam, Paul, & Uddin, 2016; Alam et al., 2018; Albayrak & Alkan, 2009; Albayrak & Gür, 2010; Al‐Dubaib, 2008, 2009; Ali, Intisar, & Khalafalla, 2014; Al‐Majali, Hussain, Amarin, & Majok, 2008; Almeshay et al., 2017; Ameen & Ajayi, 2013; Amin, 2015; Anees et al., 2013; Atta‐ur‐Rahman, Rahman, Akhtar, & Ullah, 2004; Ayim‐Akonor, Obese, Arthur, Owusu‐Ntumy, & Otsyina, 2014; Aytekin, Mamak, Ulucan, & Kalınbacak, 2011; Baazizi, Ait‐Oudhia, Parida, Mahapatra, & Khelef, 2015; Baazizi, Khelef, & Hussain, 2017; Balamurugan, Das, et al, 2014; Balamurugan, Krishnamoorthy, et al, 2014; Balamurugan et al., 2011; Balamurugan, Saravanan, et al, 2012; Banik, Podder, Samad, & Islam, 2008; Bari et al., 2018; Begum et al., 2016, 2017; Bello et al., 2016, 2018; Bhanuprakash et al., 2008; Bhaskar, Deshmukh, Chopade, Rautmare, & Aziz, 2011; Birindwa, George, Ntagereka, Christopher, & Lilly,...…”