Publications	Sequence generation	Allocation sequence concealed	Blinding of participants and personnel	Blinding of outcome assessment	Incomplete outcome data	Selective outcome reporting	Other bias
Studies with mothers
12	-	-	H	-	L	L	H
13	-	-	H	-	L	L	H
14	-	-	L	-	L	L	H
15	-	-	L	-	L	L	H
16	-	-	H	-	L	L	H
22	-	-	H	-	L	L	H
17	-	-	U	-	L	L	H
18	-	-	U	-	L	L	H
19	-	-	H	-	L	L	H
Studies with both parents
20	-	-	L	-	L	L	H
21	-	-	H	-	L	L	H
23	-	-	L	-	L	L	H
24	-	-	U	-	L	L	H
25	-	-	H	-	L	L	H