Table 1. Quality appraisal of included studies: randomised controlled trials.

Randomised Controlled Study (First Author Name)	Satisfactory Randomization	Allocation Concealment	Blinding	Adequate Follow-up	Appropriate Statistical Measures
Freemantle [35]	Appropriate cluster randomization	No	No	Yes	Yes
Dolovich [36] a	Appropriate cluster randomization	No	No	Yes	Yes

^aReceived research funding from a pharmaceutical company.