We successfully increased the rates of NG hydration in eligible children with bronchiolitis by using educational and system-based interventions.

The PHMCC-based curriculum has led to increased opportunities for education, mentorship, and improvement in the quality of care by attendees. Other academic divisions may benefit from a curriculum to enhance professional development and standardize clinical care and teaching.

We describe a systematic approach to the development of performance indicators for a pediatric hospitalist division that can be used to measure performance on a division and physician level. We outline steps to develop a broad-spectrum quality tracking process to standardize clinical care and build invaluable resources for quality improvement research.

The following text is now added to the beginning of the fourth paragraph of the 'Statistical analysis' subsection of the Methods section: "A normalization factor can be added to account for the uncertainty in the symptom onset dates of the index cases. Assuming a uniform distribution, the likelihood would only differ by a multiplicative constant and give the same estimates. " Also, the time frame in the final sentence of that paragraph ("from day 1 to 7") was incorrect. The correct time frame is "from days 5, 8 and 11. " Finally, Fig. 1c and Extended Data Fig. 1 have been replaced accordingly, and the legend to Extended Data Fig. 1 ("to start from 1 days (top left) to 7 days (bottom right) before symptom onset") is now rephrased ("to start from 5 days (top), 8 days (middle) and 11 days (bottom) before symptom onset") to match the revised figure. The errors have been corrected in the HTML and PDF versions of the article. The original code has also been replaced with updated code in Supplementary Software 1.

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