Trenkwalder, C., Kohnen, R., Allen, R. P., Benes, H., Ferini-Strambi, L., Garcia-Borreguero, D., Hadjigeorgiou, G. M., Happe, S., Högl, B., Hornyak, M., Klein, C., Nass, A., Montagna, P., Oertel, W. H., O'Keeffe, S., Paulus, W., Poewe, W., Provini, F., Pramstaller, P. P., Sieminski, M., Sonka, K., Stiasny-Kolster, K., de Weerd, A., Wetter, T. C., Winkelmann, J., & Zucconi, M. (2007). Clinical trials in restless legs syndrome - Recommendations of the European RLS study group (EURLSSG). Movement Disorders, 22(Suppl. 18), S495-S504.