“…Two studies [ 26 , 61 ] conducted in COVID-19 patients and 30 studies [ 27 – 30 , 32 , 34 , 36 , 37 , 39 , 40 , 42 , 43 , 45 , 47 , 49 , 50 , 53 , 54 , 57 – 59 , 62 , 64 – 66 , 69 , 70 , 75 , 77 , 78 ] in other diseases reported gastrointestinal AEs. The incidence of gastrointestinal AEs in the HCQ group was significantly higher than that in the control group (RD 0.03, 95%CI, 0.01 to 0.06, P = 0.02, I 2 = 55%).…”