About the Authors
Department of Hygiene and Epidemiology, University of Ioannina School of Medicine, Ioannina, Greece
Institute for Clinical Research and Health Policy Studies, Department of Medicine, Tufts University School of Medicine, Boston, Massachusetts, United States of America
The authors have declared that no competing interests exist.
PNP, GDC, and JPAI designed the study. PNP and JPAI analyzed the data. PNP, GDC, and JPAI contributed to writing the paper.