{"text_format":"3","workbook":"xls","n_sheets":3,"sheets":["Sheet1","Sheet2","Sheet3"],"read":"whole","date_system":"1900","formulas":"cached_only"}

{"sheet":"Sheet1","index":0,"n_rows":10,"n_cols":9,"rows_kept":10,"merged":[[1,1,1,8],[2,1,3,1],[2,2,3,2],[2,3,3,3],[2,4,3,4],[2,5,2,6],[2,7,3,7],[2,8,3,8],[9,1,9,8]],"flags":["formulas_cached_only"]}
[]
[null,"Table I. Characteristics of the eligible controlled trials."]
[null,"First author, year","Year","Country","Study design","Cases",null,"NOS","Refs."]
[{"$nulls":5},"BT","AS"]
[null,"Wu, 2017",2017,"China","retrospective",28,22,8,"(14)"]
[null,"Kevin, 2017",2017,"Australia","retrospective",21,21,8,"(13)"]
[null,"Levent, 2016",2016,"Turkey","retrospective",29,45,8,"(10)"]
[null,"Yin, 2014",2014,"China","retrospective",18,13,7,"(12)"]
[null,"Mahaluxmivala, 2005",2005,"UK","retrospective",6,6,7,"(6)"]
[null,"BT,bone transport; AS, acute shortening; NOS, Newcastle-Ottawa scale"]

{"sheet":"Sheet2","index":1,"n_rows":0,"n_cols":0,"rows_kept":0,"flags":["formulas_cached_only"]}

{"sheet":"Sheet3","index":2,"n_rows":0,"n_cols":0,"rows_kept":0,"flags":["formulas_cached_only"]}