Table 1.

Characteristics of the eligible controlled trials

First author	Year	Country	Study design	Cases		NOS
				BT	AST
Wu [14]	2017	China	retrospective	28	22	8
Kevin [13]	2017	Australia	retrospective	21	21	8
Levent [10]	2016	Turkey	retrospective	29	45	7
Yin [12]	2014	China	retrospective	18	13	6
Mahaluxmivala [6]	2005	UK	retrospective	6	6	6

BT Bone transport, AST Acute shortening technique, NOS Newcastle-Ottawa scale