Study Study design Selection Selection Selection Selection Comparability Comparability Exposure/Outcome Exposure/Outcome Exposure/Outcome
1 2 3 4 a b 1 2 3
Vidal et al., 2014 [7] Cohort * * * * *
Malakasioti et al., 2018 [9] Cohort * * * * *
Shiba et al., 2018 [15] Cohort * * * * *
Pérez Civantos et al., 2019 [12] Cohort * * * * * *
Pérez Civantos et al., 2019 [13] Cohort * * * * * *