Use and Awareness of Heated Tobacco Products in Europe - Gallus, Silvano (Department of Environmental Health Sciences. Istituto di Ricerche Farmacologiche Mario Negri IRCCS) ; Lugo, Alessandra (Department of Environmental Health Sciences. Istituto di Ricerche Farmacologiche Mario Negri IRCCS) ; Liu, Xiaoqiu (The George Institute for Global Health) ; Borroni, Elisa (Department of Environmental Health Sciences. Istituto di Ricerche Farmacologiche Mario Negri IRCCS) ; Clancy, Luke (TobaccoFree Research Institute Ireland. TU Dublin) ; Gorini, Giuseppe (Istituto per lo Studio. la Prevenzione e la Rete Oncologica) ; López Medina, María José (Institut d'Investigació Biomèdica Sant Pau) ; Odone, Anna (IRCCS San Raffaele Scientific Institute (Milà, Itàlia)) ; Przewozniak, Krzysztof (Foundation "Smart Health-Health in 3D") ; Tigova, Olena (Universitat de Barcelona. Facultat de Medicina i Ciències de la Salut) ; van den Brandt, Piet A. (Department of Epidemiology. GROW-School for Oncology and Developmental Biology. Maastricht University Medical Centre) ; Vardavas, Constantine (Hellenic Cancer Society) ; Fernandez, Esteve (Universitat de Barcelona. Facultat de Medicina i Ciències de la Salut)