Author	Year	Country	a_t	b_t	c_t	d_t	a_t + b_t + d_t	a_t + b_t + c_t + d_t = N_t	(a_t + b_t + d_t)/N_t
								Sample size	(SINE)
Eluf-Neto et al., 1994 [7]	1994	Brazil	167	38	32	187	392	424	0.924528302
Ngelangel et al., 1998 [8]	1998	Philippines	333	35	23	346	714	737	0.968792402
Chichareon et al., 1998 [9]	1998	Thailand	356	42	21	219	617	638	0.967084639
Chaouki et al., 1998 [10]	1998	Morocco	176	38	10	147	361	371	0.973045822
Rolón et al., 2000 [11]	2000	Paraguay	109	18	4	73	200	204	0.980392157
Franceschi et al., 2003 [12]	2003	India	204	59	1	154	417	418	0.997607656
Asato et al., 2004 [13]	2004	Japan	311	333	45	2916	3560	3605	0.987517337
Bernal et al., 2008 [14]	2008	Spain	56	210	4	990	1256	1260	0.996825397
		Total	1712	773	140	5032	7517	7657	0.981716077