nce of 5.3% (95% CI, 4.2%–6.6)% compared with studies from China 2.7% (95% CI, 2.0%–3.4%), which included 10 studies of 2447 patients.37 , 59 , 63 , 69 , 70 The symptoms were variably described as stomachache, epigastric pain, and abdo