• Changes in drug use in European cities during early COVID-19 lockdowns – A snapshot from wastewater analysis 

      Been, Frederic; Emke, Erik; Matias, João; Baz-Lomba, Jose Antonio; Boogaerts, Tim; Castiglioni, Sara; Campos-Mañas, Marina; Celma, Alberto; Covaci, Adrian; de Voogt, Pim; Hernández, Félix; Kasprzyk-Hordern, Barbara; ter Laak, Thomas; Reid, Malcolm James; Salgueiro-González, Noelia; Steenbeek, Ruud; van Nuijs, Alexander L.N.; Zuccato, Ettore; Bijlsma, Lubertus (Peer reviewed; Journal article, 2021)
      The COVID-19 outbreak has forced countries to introduce severe restrictive measures to contain its spread. In particular, physical distancing and restriction of movement have had important consequences on human behaviour ...