Erratum to: Surg Radiol Anat (2008) 30:153–157 DOI 10.1007/s00276-007-0295-0

The correlation coefficient between the posterior SP distances and age are expressed as follows:

The results section of the abstract in the first page third line:

(r = −0.150; P < 0.001)

In Table 2

r = −0.150, P < 0.001