[1] Stanford Childrens Hlth, Lucile Salter Packard Childrens Hosp Stanford, Dept Qual & Safety, Palo Alto, CA USA
[2] Cincinnati Childrens Hosp Med Ctr, Dept Radiol, Cincinnati, OH 45229 USA
[3] Univ Cincinnati, 3333 Burnet Ave, Cincinnati, OH 45229 USA