Table 1.

A summary of the published case series included in the dataset of this study

Year	Author	Country of origin	Group	N with XGC	Reference
1981	Goodman et al.	USA	Americas	40	11
2004	Valdivia et al.	Mexico	Americas	182	5
2008	Srivastava et al.	USA	Americas	11	70
2010	Goshhima et al.	USA	Americas	18	29
1987	Roberts et al.	UK	Europe	13	34
1994	Houston et al.	UK	Europe	31	14
1996	Casas et al.	Spain	Europe	12	1
2000	Parra et al.	Spain	Europe	26	4
2003	Karabulut et al.	Turkey	Europe	12	40
2007	Srinivas et al.	UK	Europe	29	24
2013	Hale et al.	UK	Europe	42	Present study
1987	Hanada et al.	Japan	Far East	23	31
1999	Mori et al.	Japan	Far East	45	71
1999	Kim et al.	Korea	Far East	19	30
2004	Kwon et al.	Japan	Far East	27	21
2007	Yang et al.	China	Far East	33	3
2007	Kwon et al.	Japan	Far East	60	72
2007	Sawada et al.	Japan	Far East	24	73
2009	Uchiyama et al.	Japan	Far East	32	7
2010	Mekky et al.	Japan	Far East	6	68
2010	Chang et al.	South Korea	Far East	49	33
1998	Dixit et al.	India	India	41	2
2004	Srikanth et al.	India	India	29	23
2008	Kansakar et al.	India	India	33	24
2008	Kumar et al.	India	India	620	41
2009	Kapoor et al.	India	India	34	63
2010	Agrawal et al.	India	India	42	74
2010	Jayalekshmi et al.	India	India	9	75
2010	Rastogi et al.	India	India	57	35