Erratum to: Eur Spine J (2016) 25:865–869 DOI 10.1007/s00586-015-4222-5

The original version of this article unfortunately contained a mistake. The first affiliation is incorrect. The correct affiliation is given below:

Spine Surgery Unit, Neurosurgery Department, Sheba Medical Center, Ramat-Gan, Affiliated to Sackler Medical School, Tel-Aviv University, Tel-Aviv, Israel.