“…In total, 82 studies were published, which denotes a low scientific production on the subject. 2020 was the year with the most documents published with a total of 31 investigations ( Caballero et al., 2020 ; Cheung et al., 2020 ; Kornas-Biela et al., 2020 ; Liang et al., 2020 ; Prihatsanti et al., 2020 ), while between 2009 and 2016 the average of 1 document per year was published. However, there is a notable increase from 2017 ( n = 7), followed by 2018 ( n = 12), 2019 ( n = 10), 2020 ( n = 31) until June 2021 ( n = 14), which shows an interest on the part of the scientific community in wanting to expand knowledge on this subject.…”