Table 1. Number of PCG patients and CYP1B1 mutations carriers .

Studies	Ethnicity	Total no. of PCG patients	M	F	No. of patients with CYP1B1 mutations	M	F
Do et al, (2016) 35	Vietnamese	30	17	13	5	2	3
Al-Haddad et al, (2016) 9	Lebanese	18	9	9	6	3	3
Abu-Amero et al, (2016) 8	Saudi	1	0	1	0	0	1
Yazdani et al, (2016) 36	Iranian	17	6	1	10	4	6
Morales-Fernandez et al, (2015) 37	Spanish	3	2	1	3	2	1
Chen et al, (2015) 32	Chinese	2	2	0	3	3	0
Cardoso et al, (2015) 38	Portuguese	21	14	7	6	NM	NM
Berraho et al, (2015) 39	Moroccan	94	53	41	51	27	24
de Melo et al, (2015) 40	Indian/Brazilian	India: 301 Brazil: 150	NM	NM	India: 132 Brazil: 66	NM	NM
Vogt et al, (August 2014) 41	Roma (Hungary)	1	1	0	1	1	0
Bouyacoub et al, (2014) 16	Tunisian	18	5	13	10	5	5
Chen et al, (2014) 42	Chinese	122	NM	NM	21	NM	NM
Sheikh et al, (2014) 43	Pakistani	36	21	15	36	21	15
Badeeb M et al, (2014) 7	Saudi	34 Saudi: 23 Non-Saudi: 11 (Yemen: 4 Sudan: 3 Afghanistan: 2 Burma: 1 Syria: 1)	21 14 7	13 9 4	27 Saudi: 21 Non-Saudi: 6	NM	NM
López-Garrido et al, (2013) 10	European	161	88	73	56	NM	NM
Lim et al, (2013) 34	United States	47	26	21	12	6	6
Khan et al, (2012) 44	Saudi	5	3	2	0	0	0
Suh and Kee, (2012) 45	Korean	85	46	49	22	10	12
Abu-Amero et al, (2011) 46	Saudi	74	38	36	41	21	20

Abbreviations: F, female; M, male; NM, not mentioned.