Table 2.

Citation matrix and corrected covered area

S. no.	Primary studies	Overlapping of primary studies in included systematic review
		Hasslof P and Twetman S, 2007	Antonarakis GS et al., 2013	Worth V et al., 2017
1.	Al-Wahandni A et al., 2005	X	X	X
2.	Boukhout B et al., 1996	X		X
3.	Dahllof G et al., 1989	X		X
4.	Hewson AR et al., 2001	X		X
5.	Lausterstein AM and Mendelsohn M, 1963	X		X
6..	Lucas JR et al., 2000	X		X
7.	Al Dajani M, 2009		X	X
8.	Fretias AB et al., 2012		X	X
9.	Hazza AM et al., 2011		X	X
10.	King NM et al., 2012		X	X
11.	Lucas JR et al., 2000		X	X
12.	Mutari T et al., 2008		X	X
13.	Pisek A et al., 2014			X
14.	Chopra A et al., 2014			X
15.	Kirchberg A et al., 2013			X
16.	Tannure PN et al., 2012			X
17.	Rawashdeh MA et al., 2011			X
18.	Britton KF et al., 2010			X
19.	Zhu WC et al., 2010			X
20.	Parapanisiou V et al., 2009			X
21.	Ahulwalia M et al., 2004			X
22.	Kirchberg A et al., 2004			X
23.	Budai M et al., 2001			X
24.	Houchstein U and Houchstein HJ, 1970			X
25.	Bethmann W et al., 1967			X

Corrected covered area (CCA) calculated by:

CCA = N-r

rc-r

N = Number of included publication (Sum of X); r = Rows (index publication); c = Columns (included reviews)