Abbreviations
ACE-2: angiotensin-converting enzyme 2
COVID-19: Coronavirus Disease 2019
GWAS: Genome-Wide Association Study
MR: Mendelian randomization
RR: risk ratio
SARS-CoV-2: severe acute respiratory syndrome coronavirus 2
SCFA: short-chain fatty acids
SNP: single nucleotide polymorphism
TLR: Toll-like receptors