Prevelance+Rate

1 per 10,000-15,000 babies in the United States a year are diagnosed.

Whites and Native Americans seem to have a higher population of affected individuals as compared to African-Americans, Hispanics, and Asians. It is just as common in males as in females. The incidence varies in different parts of the world:


 * Turkey || 1 in 2,600 ||
 * Ireland || 1 in 4,500 ||
 * United Kingdom || 1 in 9,000 ||
 * United States || 1 in 10,000 ||
 * Germany || 1 in 10,000 ||
 * Spain || 1 in 17,000 ||
 * Japan || 1 in 100,000 ||