The impact of dual tasking on cognitive performance in a Parkinson's disease cohort with and without freezing of gait: An EEG and behavioral based approach. - Saskia M. Waechter; Conor Fearon; Conor McDonnell; Jonathan Gallego; Brendan T. Quinlivan; Isabelle Killane; John S. Butler; Timothy Lynch; Richard B. Reilly (NER, 2015)