Peter Aggleton is Professor in Education and Director of the Thomas Coram Research Unit at the Institute of Education, University of London Demosthenes Agrafiotis is Professor of Sociology at the National School of Public Health in Athens, Greece Eddy Beck is a senior lecturer in epidemiology and public health at Imperial College School of Medicine, St Mary's Campus Michael Bochow is a research fellow at Intersofia (Institute for Applied Interdisciplinary Research in Social Problems), Berlin Mary Boulton is a Professor of Sociology at Oxford Brookes University Jose Catalan is a reader in psychiatry at Imperial College School of Medicine, Chelsea and Westminster Campus Valerity Chervyakov is a sociologist and Director of the Transnational Family Research Institute in Moscow Francois Delor is a researcher at Centre d'Etudes Sociologiques, Facultes Universitaires Saint-Louis, Brussels Owen Noel Gill is a consultant epidemiologist at the Communicable Disease Surveillance Centre, Public Health Laboratory Service, in London Dominique Hausser is a physician and a senior researcher at the Swiss Federal Institute of Technology Dominique Joye is currently a senior researcher at the Swiss Federal Institute of Technology Milena Komarova is a part-time social survey research consultant at the UNAIDS office in Sofia Igor Kon is a sociologist and psychologist. He is a principal researcher at the Institute of Ethnology and Anthropology, Russian Academy of Sciences, and Head of the Advisory Board for the Transnational Family Research Institute in Moscow Mirjam Kretzschmar is a senior research scientist in the Department of Infectious Diseases Epidemiology at the National Institute of Public Health and the Environment (RIVM) in Bilthoven, The Netherlands Daniel Kubler is a political scientist and researcher at the Swiss Federal Institute of Technology in Lausanne Hugues Lagrange is a senior researcher at the Observatorie Sociologique du Changement (National Centre for Scientific Research) in Paris France Lert is a senior fellow at INSERM, Saint-Maurice, France Brigitte Lhomond is a sociologist and researcher at the National Centre for Scientific Research (CNRS) in Lyons, France Christine Ann McGarrigle is a senior scientist at the Communicable Disease Surveillance Centre, Public Health Laboratory Service, in London Dominique Malatesta is a researcher in sociology at the Swiss Federal Institute of Technology in Lausanne Olga Metallinou has a specialist background in psychology and health. She is working as a psychologist at the Counselling Centre of MERIMNA -- a Society for the Care of Children and Families facing Illness and Death David Miller is Emeritus Professor of Public Health Medicine at Imperial College School of Medicine and Honorary Senior Research Fellow in the Department of Public Health at UMDS in London Jean-Paul Moatti is Professor of Economics at the University of the Mediterranean and Director of the INSERM Research Unit on Social Sciences Applied to Medical Innovation in Marseilles, France Joanne Neale is a research fellow in the Centre for Drug Misuse Research, University of Glasgow Genevieve Paicheler is Director of Research at the National Centre for Scientific Research (CNRS) in France Pauline Pantzou is a psychologist and scientific collaborator at the Department of Sociology at the National School of Public Health in Athens, Greece Annick Prieur is a researcher at the NOVA Institute for Social Research in Oslo Michel Rotily is Director of Studies at the Regional Health Watch (ORSPACA), Marseilles, France Theo Sandfort is a social psychologist in the Research School of Psychology and Health at Utrecht University and at The Netherlands Institute for Social Sexological Research (NISSO, Utrecht) Yves Souteyrand is a health economist at INSERM (the French National Institute for Health and Medical Research). He is currently Chief of the Office of Public Health and Socio-Behavioural Research at the National Agency for AIDS Research (ANRS) Bruno Spire is a virologist who recently joined the INSERM Research Unit on Social Sciences Applied to Medical Innovation in Marseilles Monika Steffen is a researcher in the French National Centre for Scientific Research (CNRS) and is an affiliate of the Institute of Political Studies at the University of Grenoble Chryssa Tselepi is a sociologist of health, she is worked as a researcher in the Department of Sociology at the National School of Public Health in Athens, Greece Biliana Vassileva is a programme assistant at the UNAIDS office in Sofia Sam Walters is a senior lecturer in paediatric infectious disease at Imperial College School of Medicine, St Mary's Campus Caren Weilandt is a psychologist and psychotherapist who works for the Scientific Institute of the German Medical Association (WIAD) Jeffrey J. Weiss is a clinical psychologistMoatti, J. -P is the author of 'AIDS in Europe New Challenges for the Social Sciences' with ISBN 9781857285079 and ISBN 1857285077.