Erratum to: Neurol Sci DOI 10.1007/s10072-012-1283-7

Owing to a technical error, the author Valeria Elisa Contarino was inadvertently missed from the list of authors. The correct author group is given below.

Author group:

Antonella Mangraviti · Cecilia Casali · Roberto Cordella · Federico Giuseppe Legnani · Luca Mattei · Francesco Prada · Andrea Saladino · Valeria Elisa Contarino · Alessandro Perin · Francesco DiMeco

Valeria Elisa Contarino

Neuroradiology, Fondazione IRCCS Istituto Neurologico C. Besta, Milan, Italy

The article also featured an incomplete record of the acknowledgments. The correct version should read as:

“We are grateful to the Tekmed Instruments S.p.A Milan for leasing the Nexstim NBS System 4.0 free of charge; special thanks go to engineers Silvia Marelli and Marco Romiti for their professional assistance”. The co-authors apologize for the inconvenience to all concerned.