“…Descriptive analyses of these articles were presented in Table 1 . Of the 12 eligible trials, 2 (Shi et al 2013b ; Guo et al 2007 ) were written in Chinese, the other 10 (Pleym et al 2003 ; Ahn et al 2012 ; Shi et al 2013a , 2013c ; Altun et al 2017 ; Banihashem et al 2019 ; Khadanga et al 2020 ; Landymore et al 1997 ; Aelbrouck et al 2016 ; Myles et al 2017 ) were in English (1 (Ahn et al 2012 ) from Korea, 2 (Shi et al 2013a , 2013c ) from China, 1 (Altun et al 2017 ) from Turkey, 1 (Banihashem et al 2019 ) from Iran, 1 (Khadanga et al 2020 ) from India, 1 (Landymore et al 1997 ) from Canada, 1 (Pleym et al 2003 ) from Norway, 1 (Aelbrouck et al 2016 ) performed in Belgium and USA, 1 (Myles et al 2017 ) performed in Australia, Canada, Italy, the Netherlands, New Zealand, China (Hong Kong), and UK). Seven trials (Pleym et al 2003 ; Shi et al 2013a , 2013b , 2013c ; Altun et al 2017 ; Banihashem et al 2019 ; Landymore et al 1997 ) included participants undergoing on-pump CABG, three trials (Ahn et al 2012 ; Khadanga et al 2020 ; Guo et al 2007 ) included off-pump CABG patients, and two trials (Aelbrouck et al 2016 ; Myles et al 2017 ) included mixed cardiac surgical patients.…”