[1] St Christophers Hosp Children, 160 E Erie Ave, Philadelphia, PA 19130 USA
[2] Drexel Univ, Coll Med, Dept Pediat, Philadelphia, PA 19104 USA
[3] Uniformed Serv Univ Hlth Sci, Dept Pediat, Bethesda, MD 20814 USA
[4] Walter Reed Natl Mil Med Ctr, Bethesda, MD USA
[5] Univ Toronto, Dept Pediat, Toronto, ON, Canada
[6] Hosp Sick Children, 555 Univ Ave, Toronto, ON M5G 1X8, Canada
[7] Amer Board Pediat Inc, Competency Based Assessment, Chapel Hill, NC USA
[8] Assoc Amer Med Coll, Competency Based Learning & Assessment, Washington, DC USA
[9] Harvard Univ, Sch Med, Dana Farber, Pediat Hematol Oncol, Boston, MA USA
[10] Harvard Univ, Sch Med, Boston Childrens Hosp, Canc & Blood Disorders Ctr, Boston, MA USA
[11] Harvard Univ, Sch Med, Dept Med & Pediat, Boston, MA USA
[12] Boston Childrens Hosp, Dept Med, Boston, MA USA
[13] Brigham & Womens Hosp, 75 Francis St, Boston, MA 02115 USA
[14] Uniformed Serv Univ Hlth Sci, Dept Pediat, Bethesda, MD 20814 USA
[15] Walter Reed Natl Mil Med Ctr, Bethesda, MD USA
[16] Harvard Univ, Sch Med, Pediat, Boston, MA USA
[17] Boston Childrens Hosp, Boston, MA USA
[18] Oregon Hlth & Sci Univ, Dept Pediat, 3181 Sw Sam Jackson Pk Rd, Portland, OR 97201 USA
[19] OHSU Doernbecher Childrens Hosp, Portland, OR USA
[20] Drexel Univ, Coll Med, Dept Pediat, Pediat, Philadelphia, PA 19104 USA
[21] Univ Calif San Francisco, Sch Med, Dept Pediat, Pediat, San Francisco, CA 94143 USA
[22] UCSF Benioff Childrens Hosp, San Francisco, CA USA