Table 2.

Results of the pairwise chi-squared tests (performed as exact tests)

Study	Morocco	USA2	France	Iran	Sri Lanka
USA1	0.6902	<0.0001*	0.0013*	0.0003*	<0.0001*
Morocco		<0.0001*	1.0000	0.0521	1.0000
USA2			<0.0001*	<0.0001*	<0.0001*
France				0.0054*	0.0115*
Iran					<0.0001*

The values shown are Bonferroni adjusted p-values. All values significant at the 5% level are shown with an asterisk.