Nature Reviews Genetics 3, 954–966 (2002).

The entry for Niemann–Pick Type C disease in Table 1 was incorrect. It should have read as follows: Table 1

Table 1 Table 1

The entries for Gaucher type 1 and MPSII in Table 2 were incorrect. They should have read as follows: Table 2

Table 2 Table 2

In addition, the second sentence in the section 'Enzyme replacement therapy: clinical trials' contained an error and should have read: Preclinical studies in knockout mice or other naturally occurring animal models (such as the dog model of mucopolysacch aridosis I) are under way for several other disorders, including type B Niemann–Pick disease42, galactosialidosis86, Wolman disease (cholesteryl ester storage disease)59 and mucopolysaccharidosis VII87,88.