GSTM1 and peptic ulcer disease: Variables of interest included age, gender, ethnicity, cirrhosis, peptic ulcer disease, prior GIB, coagulopathy, anticoagulation, date of COVID-19 swab, time to COVID-19 results, time to intervention, type of intervention (EGD, colonoscopy, therapeutic angiography with embolization), hemodynamic instability (tachycardia, hypotension, orthostasis, dizziness, light-headedness, syncope, dyspnea), admission Hb, nadir Hb during hospitalization, and mortality.