Study Exclusion reasons Remarks Reference(s)
Yin Wang et al., 2020 retrospective cohort (registry) not relevant study design

Yin Wang et al. medRxiv 10.1101/2020.03.06.20032342

 
Bernaola, 2020 retrospective cohort other

Nikolas Bernaola medrxiv;2020.07.17.20155960v1 10.1101/2020.07.17.20155960