The impact of a structured exercise programme upon cognitive function in chronic fatigue syndrome patients by Zalewski, P, Kujawski, S, Tudorowska, M, Morten, K, Tafil-Klawe, M, Klawe, JJ, Strong, J, Estévez-López, F, Murovska, M, Newton, JL, European Network On Me/Cfs Euromene