An observational study of nurse staffing ratios and hospital readmission among children admitted for common conditions
Heather L Tubbs-Cooley, Jeannie P Cimiotti, Jeffrey H Silber, Douglas M Sloane, Linda H Aiken
BMJ Qual Saf Sep 2013, 22 (9) 735-742; DOI: 10.1136/bmjqs-2012-001610