Clemens Tesch-Römer, director of the German Centre of Gerontology and associate professor for psychology at the Free University Berlin, has published 20 books and about 200 scholarly journal articles and chapters on ageing. He is PI of the German Ageing Survey and has been co-speaker of a European Network on ageism. He is a fellow of the Gerontological Society of America and was president of the German Society for Gerontology and Geriatrics, president of the International Association of Gerontology and Geriatrics, European Region as well as a member of expert commissions for the German Federal Government's reports on older persons. Hans-Werner Wahl is a former Professor of Psychological Aging Research. He is currently the Director of the Network Aging Research of Heidelberg University. He is the author or editor of more than 30 books and more than 400 scholarly journal articles and chapters related to behavioral aging. He is the founding editor of the European Journal of Ageing (together with Dorly Deeg) and a fellow of the Gerontological Society of America. He has received the 2008 Social Gerontology Award (together with Manfred Diehl), the 2009 M. Powell Lawton Award of the GSA, and the 2019 IAGG-ER Advanced Scholar Award. Suresh I.S. Rattan Ph.D.,D.Sc., is Professor Emeritus of Biogerontology at the Department of Molecular Biology and Genetics, Aarhus University, Denmark. He is the founder and Editor-in-Chief of Biogerontology - an international peer reviewed journal published by Springer-Nature. His research areas and expertise include ageing of human cells and application of the concept of mild stress-induced hormesis as a modulator of ageing. He is the recipient of the Lord Cohen Medal in Gerontology from the British Society for Research on Ageing (BSRA), and an Honorary Doctorate from the Russian Academy of Medical Sciences (St. Petersburg branch). He has published more than 300 scientific articles, and has edited/co-edited 15 books, including books for children, general public and research scientists. He is the present Chairman of the Biological Section of the European Region of the International Association of Gerontology and Geriatrics Liat Ayalon, PhD, is a researcher in the School of Social Work, at Bar Ilan University, Israel. Prof. Ayalon coordinates an international EU funded Ph.D. program on the topic of ageism (EuroAgeism). She is also the Israeli PI of the EU funded MascAge program to study ageing masculinities in literature and cinema. Prof. Ayalon has led (with Prof. Tesch-Römer) an international research network on the topic of ageism, funded through COST (Cooperation in Science and Technology; COST IS1402). Prof. Ayalon is the author of more than 200 peer-reviewed articles and the co-editor of a book on ageism. She consults both national and international organizations concerning the development and evaluation of programs and services for older adults.