aChildrens Orthopaedic Center, Childrens Hospital Los Angeles
bDepartment of Orthopaedic Surgery, Keck School of Medicine
cDepartments of Radiology and Biomedical Engineering, University of Southern California, Los Angeles, California
dCastle Medical Center, Kailua, Hawaii, USA
Correspondence to Susan A. Rethlefsen, PT, Childrens Orthopaedic Center, Childrens Hospital Los Angeles, 4650 Sunset Boulevard, MS 69, Los Angeles, CA 90027, USA
Tel: +1 323 361 4120; fax: +1 323 666 4409;
e-mail: [email protected]
The study was conducted at the Childrens Hospital Los Angeles, Los Angeles, California, USA
