About the Authors

Georgios K. Nikolopoulos

gknikolopoulos@gmail.com

Affiliations Department of Hygiene, Epidemiology and Medical Statistics, Athens University Medical School, Athens, Greece, Hellenic Centre for Disease Control and Prevention, Amarousio, Greece

Anastasios Fotiou

Affiliations Greek Reitox Focal Point of the EMCDDA, University Mental Health Research Institute, Athens, Greece, Department of Psychiatry, Athens University Medical School, Athens, Greece

Eleftheria Kanavou

Affiliation Greek Reitox Focal Point of the EMCDDA, University Mental Health Research Institute, Athens, Greece

Clive Richardson

Affiliations Greek Reitox Focal Point of the EMCDDA, University Mental Health Research Institute, Athens, Greece, Panteion University of Social and Political Sciences, Athens, Greece

Marios Detsis

Affiliation Department of Hygiene, Epidemiology and Medical Statistics, Athens University Medical School, Athens, Greece

Anastasia Pharris

Affiliation European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden

Jonathan E. Suk

Affiliation European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden

Jan C. Semenza

Affiliation European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden

Claudia Costa-Storti

Affiliation European Monitoring Centre for Drugs and Drug Addiction (EMCDDA), Lisbon, Portugal

Dimitrios Paraskevis

Affiliation Department of Hygiene, Epidemiology and Medical Statistics, Athens University Medical School, Athens, Greece

Vana Sypsa

Affiliation Department of Hygiene, Epidemiology and Medical Statistics, Athens University Medical School, Athens, Greece

Melpomeni-Minerva Malliori

Affiliation Department of Psychiatry, Athens University Medical School, Athens, Greece

Samuel R. Friedman

Affiliation National Development and Research Institutes, New York, New York, United States of America

Angelos Hatzakis

Affiliation Department of Hygiene, Epidemiology and Medical Statistics, Athens University Medical School, Athens, Greece

Competing Interests

Co-author Dimitrios Paraskevis is a PLOS ONE Editorial Board member. This does not alter the authors' adherence to PLOS ONE Editorial policies and criteria.

Author Contributions

Conceived and designed the experiments: GKN AF AP JES JCS CCS SRF MMM AH. Analyzed the data: GΚN AF EK CR MD VS DP. Wrote the paper: GKN AF EK CR MD AP JES JCS CCS VS DP MMM SRF AH. Approved the final version of the manuscript: GKN AF EK CR MD AP JES JCS CCS VS DP MMM SRF AH.