The authors regret that an error occured in the authorship of the published article indicated above. The correct authorship is as follows:
Michele MARCHESEa, Lucia ROMANOb, Antonio GIULIANIb, Giovanni CIANCAb, Alessandra DI SIBIOc, Francesco CARLEIb, Gianfranco AMICUCCIb, Mario SCHIETROMAb
aSurgical Endoscopy Unit, San Salvatore Hospital, L'Aquila, Italy
bDepartment of Surgery, University of L’Aquila, L’Aquila, Italy
cDepartment of Radiology, University of L’Aquila, L’Aquila, Italy
The authors would like to apologise for any inconvenience caused.