1. Institute for Neuropathic Pain, Vespuccistraat 64-III, 1056 SN Amsterdam, Netherlands
2. Institute for Neuropathic Pain, Spoorlaan 2a, 3735 MV Bosch en Duin, Netherlands
3. Habilita, Care & Research Rehabilitation Hospitals, Via Bologna 1, 24040 Zingonia, Italy