Karen M. Anderson, University of Southampton, UK Pietro Checcucci, Institute for the Development of the Vocational Training of Workers (ISFOL), Italy Mirko Di Rosa, Italian National Institute of Health and Science on Ageing (INRCA), Italy Theodore P. Gerber , University of Wisconsin-Madison, USA Steffen Hagemann, University of Bremen, Germany Björn Halleröd, University of Gothenburg, Sweden Anna Hokema, University of Bremen, Germany Harald Künemund, University of Vechta, Germany Giovanni Lamura, Italian National Institute of Health and Science on Ageing (INRCA), Italy Thomas Lux, University of Bremen, Germany Victor W. Marshall, Independent Scholar, USA Katey Matthews, University of Manchester, UK James Nazroo, University of Manchester, UK Andrea Principi, Italian National Institute of Health and Science on Ageing (INRCA), Italy Jonas Radl, Carlos III University of Madrid, Spain Jutta Schmitz, University Duisburg-Essen, Germany Klaus Schömann, Leibniz Centre for Lifelong Learning, Germany and Jacobs University Bremen, Germany Silke van Dyk, University of Kassel, Germany Ge Yu, Liaoning University, China, University of Bremen, Germany and Jacobs University Bremen, Germany