Table 1. Characteristics of the manuscripts reviewed to perform the analyses.

Study	Available in public databases	Complete metadata	Information in databases according to article	Used for this study	Index
Mancabelli et al. (2016)	x	x	x	x	1
Shaufi et al. (2015)	x	x	x	x	2
Ballou et al. (2016)	x	x	x	x	3
Costa et al. (2017)	x	x	x	x	4
Xu et al. (2016)	x	x	x	x	5
Xia et al. (2019)	x	x	x	x	6
Varmuzova et al. (2015)	x	x	x	x	7
Biasato et al. (2018)	x	x	x	x	8
Zhou et al. (2016)	x	x	x	x	9
Awad et al. (2016)	x				NA
Han et al. (2016)	x				NA
Kim et al. (2018)					NA
Kollarcikova et al. (2019)					NA
Krueger et al. (2017)	x				NA
Li et al. (2016)		x			NA
Ma et al. (2017)					NA
Marimuthu et al. (2019)					NA
Mon et al. (2015)		x			NA
Park, Lee & Ricke (2016)					NA
Park et al. (2017)					NA
Polansky et al. (2016)					NA
Saxena et al. (2016)					NA
Varmuzova et al. (2016)					NA
Wang et al. (2018)	x				NA
Wu et al. (2019)					NA
Xiao et al. (2016)					NA
Yan et al. (2017)					NA

Note:

Each column represents one of the search parameters that were taken into account in order to select the most suitable studies. Articles that fulfilled each criterion were labeled with an X. The column titled “Used for this study” lists the studies selected for the analysis, whereas the last column contains the index assigned to each study, which is used as reference in different figures. NA refers to Not Applicable.