Long term results of the VANTAGE study: A prospective multicenter trial evaluating deep brain stimulation with a multiple source, constant current system in Parkinson's disease. (January 2018) - Brücke, T.; Jain, R.; Van Dyck, N.; Chen, L.; Thun, P.; Seijo, F.; Suarez San Martin, E.; Visser-Vandewalle, V.; Barbe, M.; Gill, S.; Whone, A.; Porta, M.; et al.