Table 2.

List of biases in RCTs

	Random sequence generation	Allocation concealment	Blinding of participants and personnel	Blinding of outcome assessment	Incomplete outcome data	Selective reporting	Other bias
Budenz DL (2015)	low risk	low risk	high risk	high risk	low risk	low risk	/
Christakis PG (2013)	low risk	low risk	high risk	high risk	low risk	low risk	/