[1] Childrens Hosp Philadelphia, Dept Radiol, Philadelphia, PA 19104 USA
[2] Albert Einstein Coll Med, Childrens Hosp Montefiore, Dept Radiol, New York, NY USA
[3] Hosp Sick Children, Dept Diagnost Imaging, Toronto, ON, Canada
[4] Univ Mississippi, Med Ctr, Dept Radiol, Jackson, MS 39216 USA
[5] Michigan Med, Dept Radiol, CS Mott Childrens Hosp, Sect Pediat Radiol, Ann Arbor, MI USA
[6] Univ Washington, Sch Med, Seattle Childrens Hosp, Dept Radiol, 4800 Sand Point Way NE,MA-7-220, Seattle, WA 98105 USA
[7] Texas Childrens Hosp, Dept Radiol, Houston, TX 77030 USA
[8] Univ Washington, Sch Med, Seattle Childrens Hosp, Dept Infect Dis, Seattle, WA USA
[9] Nemours Childrens Hosp, Dept Radiol, Orlando, FL USA
[10] Oregon Hlth & Sci Univ, Doernbecher Childrens Hosp, Dept Radiol, Portland, OR USA
[11] IWK Hlth Ctr, Dept Diagnost Imaging, Halifax, NS, Canada
[12] Natl Childrens Hosp, Dept Diagnost Imaging & Radiol, Washington, DC USA
[13] Univ Pittsburgh, Dept Radiol, Pittsburgh, PA 15260 USA