1 Kaiser Permanente Division of Research, 2000 Broadway, Oakland, CA, 94612, USA.
2 Division of Maternal and Child Health, University of California, Berkeley, School of Public Health, 2121 Berkeley Way #5302, Berkeley, CA, 94720, USA.
3 Kaiser Permanente San Francisco Medical Center, 2425 Geary Boulevard, San Francisco, CA, 94115, USA.
4 Kaiser Permanente Division of Research, 2000 Broadway, Oakland, CA, 94612, USA. Ai.Kubo@kp.org.
Following publication of the original article [1], the authors reported that Table 4 was incorrectly presented. The revised and corrected version is shown below.