1 Applied Technology for Neuro-Psychology Lab, IRCCS Istituto Auxologico Italiano, Via Ariosto 13, 20145 Milan, Italy.
2 Telefonica I&D, Plaça Ernest Lluch I Marti 5, 08019 Barcelona, Spain.
3 Information Technologies Institute, Centre for Research and Technology Hellas, 6th Km Charilaou-Thermi Road, P.O. Box 361, 57001 Thessaloniki, Greece.
4 Wenzhou Medical College, Wenzhou, Zhejiang 325035, China.