Thores O A, Philion J
Can Med Assoc J. 1973 Dec 1;109(11):1108-9.
An investigation into the incidence of Down's syndrome in British Columbia Indians disclosed that this was little different from that in the non-Indian population. The clinical features of the condition are common to both groups.
对不列颠哥伦比亚省印第安人中唐氏综合征发病率的一项调查显示，这与非印第安人群中的发病率几乎没有差异。该病症的临床特征在两组中都很常见。
