6.4% of the European population suffers from depression, according to a study published in The Lancet Public Health. The work was led by researchers from King's College London, the Hospital del Mar Medical Research Institute (IMIM), the Parc de Recerca Sant Joan de Déu-Institut de Recerca Sant Joan de Déu, the Institute of Biomedicine at the University of León (IBIOMED), and the CIBER on Epidemiology and Public Health (CIBERESP). This figure is higher than that estimated by the World Health Organisation (WHO), which calculated the prevalence of this pathology in the European region at 4.2%. Depression is considered to be one of the leading causes of disability around the world, increasing the risk of premature death, decreasing quality of life and being a heavy burden on health systems. In fact, it is estimated that it may affect more than 300 million people worldwide.