The typographical corrections below were made to the article on the date noted. These changes have been incorporated in the article and the details are documented here.

2 January 2001:

In the Results section of the Abstract, "C1075CT" was corrected to "C1075T" in:

...insertion and a heterozygous C1075CT mutation.

In the Results section, "C1075CT" was corrected to "C1075T" in:

...for a G1189C and the C1075CT polymorphism (Table 1).