Table 8. Quality assessment score.

References	Score	Total
Naqvi, Majid & Abbas (2021), Basiri et al. (2021), Minaee et al. (2021) and Dong & Lian (2021)	8	5
Safder et al. (2021), Mukhtar & Khan (2020), Naqvi et al. (2020), Asif et al. (2020), Badaro et al. (2019) and Bibi et al. (2019)	7	8
Basiri, Naghsh-Nilchi & Ghassem-Aghaee (2014), Mehmood, Essam & Shafi (2018), Majeed, Mujtaba & Beg (2020) and Khattak et al. (2021)
Mehmood et al. (2020), Basiri et al. (2020), Pourpanah et al. (2020), Raza et al. (219),Lin & He (2009), Zhou et al. (2017), Sattar & Fatima (2021), Hassan et al. (2019) and Jena (2019)	6	14
Seo et al. (2020), Ali et al. (2021), Mukhtar, Khan & Chiragh (2018), Ghulam et al. (2019), Mehta & Pandya (2020), Hemmatian & Sohrabi (2019), Marrese-Taylor, Velásquez & Bravo-Marquez (2014), Babu, Kumari & Kamakshaiah (2017), Idrees et al. (2019), Altrabsheh, Cocea & Fallahkhair (2014) and Mehmood et al. (2019a)	5	13