Table 3. Quality Assessment of Included Trials.

Trial	Random sequence generation	Allocationconcealment	Blinding of participantsand personnel	Blinding of outcome assessment	Incompleteoutcome data	Selective reporting	Other bias	Jadad Scale
Taylor (1998)	+	+	−	?	+	+	+	3
Trivedi (2003)	+	+	−	?	+	+	−	3
Dussol (2006)	+	+	−	?	+	+	+	3
Lawlor (2007)	+	+	−	?	+	+	+	3
Cho (2010)	?	?	−	?	+	+	+	1
Wrobel (2010)	?	?	−	?	+	+	?	1