Erratum: Correction to: Learning curves of two different techniques for the intra-articular injection of the knee joint under fluoroscopic guidance (La Radiologia medica (2018) 123 5 (359-366))

peer reviewedThe published version of this article contained a mistake. In Table 1 of the original article, the numbers of successful injections and failed injections were not correct. The correct Table 1 should read as given below