Table 2.

Genotype correlation with neurological involvement

Genotype	Neurological signs n = 20	No neurological signs n = 4
A439V (%)	1 (25)	3 (75)
R260W (%)	12 (60)	0 (0)
T348M (%)	3 (15)	1 (25)
Other mutations (%)	4 (20)	0 (0)