RECENTLY, more media attention has been drawn on the
increase of autism with the international prevalence rate
of 60 per 10 000 applied across cultures [1], [2]. An average of
1 in 88 children in theUnited States is identified to have autism,
while an estimated prevalence of autism in China is 5 per 10 000
[3]. In Singapore, the estimated prevalence rate of individuals
with autism in the population of 4 million is 1 per 166 [4]. However,
no sound scientific evidence indicates that the increasing
number of diagnosed cases of autism arises from anything other