[1] Sheffield Childrens NHS Fdn Trust, Western Bank, Acad Unit Child Hlth, Sheffield S10 2TH, S Yorkshire, England
[2] Chinese Univ Hong Kong, Shatin, Hong Kong, Peoples R China
[3] Prince Wales Hosp, Shatin, Hong Kong, Peoples R China
[4] Tygerberg Hosp, Cape Town, South Africa
[5] Univ Stellenbosch, Cape Town, South Africa
[6] Cambridge Univ Hosp NHS Fdn Trust, Cambridge, England
[7] Univ Vermont, Coll Med, Burlington, VT 05405 USA
[8] Harvard Univ, Sch Med, Dept Radiol, Div Magnet Resonance,Boston Childrens Hosp, Boston, MA 02115 USA
[9] Harvard Univ, Sch Med, Dept Radiol, Div Thorac Imaging,Boston Childrens Hosp, Boston, MA 02115 USA
[10] Harvard Univ, Sch Med, Dept Med, Div Magnet Resonance,Boston Childrens Hosp, Boston, MA USA
[11] Harvard Univ, Sch Med, Dept Med, Div Thorac Imaging,Boston Childrens Hosp, Boston, MA USA