title: Corrections and clarifications.
abstract: In the report "DNA sequence determination by hybridization: A strategy for efficient large-scale sequencing" by R. Drmanac et al. (11 June, p. 1649), the sequence of clone 8 in figure 2B (p. 1650) was inadvertently shortened by the deletion of "GA" at the seventh position from the right in the second line. In reference 20 of the same report, the probes ATATGGGG and ATGTCCTG should not have been included.