By Christina Frangou

Nashville, tenn.—On Feb. 22, 2001, Cheryl Connors arrived for her shift as a pediatric nurse at Johns Hopkins Hospital in Baltimore. The next 24 hours changed Ms. Connors and her colleagues forever.

On that shift, an 18-month-old girl named Josie King, who was almost ready to go home after treatment for severe burns, died from extreme dehydration and undetected infection.

Ms. Connors, DNP, RN, who was three years into her nursing career, was precepting a new nurse that