“…After identifying total of 279 studies, 142 duplicates were removed, and 99 irrelevant studies were excluded based on the titles and abstracts. The full text of 38 articles was read, and 27 retrospective studies were included in the systematic review ( 8 , 11, 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 ). Due to six studies discussing hip and knee replacements ( 38 , 38 , 39 , 40 , 41 , 42 ), we were unable to separate and extract knee-specific data for inclusion in our article.…”