Random effect model forest plot of serum level of alanine transaminase in poultry birds fed natural diet contaminated with and without aflatoxins. Each data marker represents a study, and the size of the red box is proportional to the weight of the study. The summary effect size is denoted by the blue diamond. References: Liu et al. [29], Subhani et al. [26], Rajput et al. [28], Sridhar et al. [30], Solis-Cruz et al. [25], Sridhar et al. [32], Bintvihok et al. [34], Sadeghi et al. [31], Muhammad et al. [33], Nabi et al. [21], Cao et al. [8], Almusawi et al. [24], Malekinezhad et al. [22], Rashidi et al. [23], Ulaiwi et al. [27], Lin et al. [19], Mesgar et al. [20], Muhammad et al. [33], Rashidi et al. [23], Pappas et al. [44], Allameh et al. [5], Almusawi et al. [24], Mahrose et al. [41], Pappas et al. [44], Barati et al. [7], Rashidi et al. [23], Valchev et al. [42], Xie et al. [4], Stanley et al. [40], Ejiofor et al. [36], Allameh et al. [5], Motawe et al. [38], Barati et al. [7], Rashidi et al. [23], Basmacioglu et al. [39], Hernandez-Ramires et al. [36], Solis-Cruz et al. [25], Cao et al. [8], Salem et al. [37], Barati et al. [7], Ulaiwi et al. [27], Mahrose et al. [41], Pappas et al. [44].