ACE2	angiotensin-convertase enzyme 2
BMI	body mass index
CDI	Clostridium difficile infection
COVID-19	coronavirus disease 2019
ESR	erythrocyte sedimentation rate
NO	nitric oxide
SARS-CoV-2	severe acute respiratory syndrome coronavirus 2
TM	toxic megacolon
TMPRSS2	transmembrane protease serine 2
UC	ulcerative colitis
WHO	World Health Organization