Erratum to: J Child Orthop DOI 10.1007/s11832-015-0685-5

In the original publication, the name of one of the co-authors has been published incorrectly. The correct name should be Nigel Kiely.

Furthermore, the affiliation of Dr. Rohit Singh and Dr. Stuart Hay is included now.

Royal Shrewsbury Hospital, Shrewsbury, Shropshire SY38XQ, UK.