Table 1.

Incidence rate of studies of HBV infection and CCA.

Authors	Year	Country	HBV infection cases (n)	CCA cases (n)	Reference
Matsumoto et al.	2014	Japan	29	145	[11]
Luo et al.	2014	China	608	1233	[12]
Liu et al.	2013	China	37	81	[13]
Yin et al.	2013	China	139	411	[14]
Zhou et al.	2013	China	88	239	[15]
Wu et al.	2013	China	97	138	[16]
Lee et al.	2013	China (Taiwan)	29	127	[17]
Barusrux et al.	2012	Thailand	24	295	[18]
Yin et al.	2012	China	131	386	[19]
Qu et al.	2012	China	19	305	[20]
Wu et al.	2012	China	18	66	[21]
Jiang et al.	2011	China	44	102	[22]
Zhou et al.	2011	China	87	155	[23]
Park et al.	2011	Korea	32	160	[24]
Zhou et al.	2010	China	154	317	[25]
Zhou et al.	2008	China	64	131	[26]
Zuo et al.	2007	China	20	59	[27]
Fukuhara et al.	2001	Japan	4	53	[28]
Lee et al.	2006	Korea	11	79	[29]
Pinyosophon and Wiwanitkit	2002	Thailand	5	55	[30]
Asayama et al.	2002	Japan	8	68	[31]