Table 7.

To what extent do the included reviews reference each other

	King, 1998[[17]]	Dobbins & Beyers, 1999[[12]]	Pate, 2000[[18]]	Fogelholm & Lahti-Koski, 2002[[16]]	Sharpe, 2003[[19]]	Jacksonet al., 2005a[[14]]	Jacksonet al., 2005b[[15]]	Murphy & Bauman, 2007[[13]]	Total cited/total possible
King, 1998	This was the first review of the eight to be published so we would not expect it to cite any of the others.								0/0
Dobbins & Beyers, 1999	-	-	-	-	-	-	-	-	0/0
Pate, 2000	Yes	-	-	-	-	-	-	-	1/1
Fogelholm & Lahti-Koski, 2002	Yes	No	No	-	-	No	No	-	1/5
Sharpe, 2003	Yes	No	Yes	-	-	-	-	-	2/3
Jackson et al., 2005a	No	No	No	No	No	-	No	-	0/6
Jackson et al., 2005b	No	No	No	No	No	No	-	-	0/6
Murphy and Bauman, 2007	No	No	No	No	No	No	No	-	0/7
Total citations of review (column total)	3	0	1	0	0	0	0	0	4/28

- Indicates where we would not expect the review to be cited, either because it would be citing itself or because there is a year or less between review publication dates.