Corrections and clarifications

Influence of variation in birth weight within normal range and within sibships on IQ at age 7 years: cohort study

In this article by Thomas D Matte and colleagues (11 August, pp 310-4) the same editing error slipped into two tables and persisted to final publication. The value 1.0, which appeared four times in table 3 and twice in table 4, was wrong. The entry in each case should read “Reference 0.”