“…Five studies were carried out in Asia (Hong Kong, South Korea, Taiwan, and Saudi Arabia), 8 , 10–13 six in North America (USA), 4 , 6, 14–17 and nine in Europe (Italy, the Netherlands, Serbia, and the United Kingdom) 2 , 3, 5, 7, 18–22 . Six studies reported patients with UGIH caused by peptic ulcer, 8 , 10, 12, 19, 20, 22 one study included patients with bleeding gastroduodenal angiodysplasia, 17 three demonstrated the sources of bleeding were from the esophagus varix, 11 , 13, 15 and 10 studies included patients with both variceal and nonvariceal UGIH 2 , 3, 5–7 , 14, 16, 18, 21, 22 . Most recruited studies defined the “off‐hours” as weekends only,4–7, 11, 13–17 , 21 while four studies defined it as weekends and public holidays; 3 , 8, 12, 18 one study defined it as weekends and nighttime, 20 and one study defined it as nighttime only 19 .…”