From the Division of Neonatology (J.W., M.C.), Department of Pediatrics, University of British Columbia; Division of Neonatology (K.K.), Department of Pediatrics, University of Saskatchewan; and Division of Neonatology (H.W., K.-S.L., D.M.C.), Department of Pediatrics, and Department of Medical Imaging (M.S.), University of Toronto, Toronto, Ontario, Canada.

Correspondence to: Jonathan Wong, MD, FRCPC, MScCH, BC Children's and Women's Hospital, 1R34 – 4500 Oak St, Vancouver, BC, V6H 3N1 (e-mail: [email protected]).

The authors declare no conflict of interest.

This study is attributed to Division of Neonatology, Department of Pediatrics, University of Toronto and Hospital for Sick Children, Toronto, Ontario, Canada.

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