[1] Boston Childrens Hosp, Div Resp Dis, Dept Med, Boston, MA 02215 USA
[2] Inst Healthcare Improvement, Cambridge, MA USA
[3] Univ Pittsburgh, Sch Med, Dept Pediat, Childrens Hosp Pittsburgh UPMC, Pittsburgh, PA 15261 USA
[4] Univ Pittsburgh, Sch Med, CWHRI, Pittsburgh, PA USA
[5] Univ Pittsburgh, Dept Med, Med Ctr, Pittsburgh, PA USA
[6] Univ Pittsburgh, Ctr Res Hlth Care Data Ctr, Div Gen Internal Med, Pittsburgh, PA USA
[7] Childrens Natl Hlth Syst, Div Adolescent & Young Adult Med, Washington, DC USA
[8] Univ Alabama Birmingham, Sch Nursing, Birmingham, AL USA
[9] Univ Penn, Div Pulm Med, Childrens Hosp Philadelphia, Dept Pediat,Perelman Sch Med, Philadelphia, PA 19104 USA
[10] Univ Penn, Cyst Fibrosis Ctr, Childrens Hosp Philadelphia, Dept Pediat,Perelman Sch Med, Philadelphia, PA 19104 USA
[11] Univ Colorado, Sch Med, Childrens Hosp Colorado, Dept Pediat, Aurora, CO USA
[12] VA Pittsburgh Ctr Hlth Equ Res & Promot, Pittsburgh, PA USA