Table 3.

Success rate of internal and external DCR [34-37]

	Success rate
	External DCR	Internal DCR
Hartikainen J (1998)	89.1%	90.2%
Cokkeser Y (2000)	88.2%	89.2%
Vivek KP (2013)	90%	86.67%
Dey AK (2014)	93.33%	90%