response letter, page-21

oops should have said "isn't as a big a problem"


"Cystic fibrosis is the most common life-limiting autosomal recessive disease among people of Caucasian heritage.[97] In the United States, approximately 30,000 individuals have CF; most are diagnosed by six months of age. In Canada, there are approximately 3,500 people with CF.[98] Approximately 1 in 25 people of European descent, and one in 30 of Caucasian Americans,[99] is a carrier of a cystic fibrosis mutation. Although CF is less common in these groups, approximately 1 in 46 Hispanics, 1 in 65 Africans and 1 in 90 Asians carry at least one abnormal CFTR gene.[100][101] Ireland has the world's highest incidence of cystic fibrosis, at 1:1353.[102]"

from wiki too