“…The flow diagram of the study process is shown in Figure 1 . A total of 13 retrospective cohort studies [ 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ] were finally included. These included studies originating from Canada, Italy, Poland, Australia, India, Finland, the United States, Japan, China, Greece, and the Netherlands.…”