Protocol for the “magnitude of cigarette substitution after initiation of e-cigarettes and its impact on biomarkers of exposure and potential harm in dual users” (MAGNIFICAT) study... oleh Riccardo Polosa, Riccardo Polosa, Riccardo Polosa, Nikola Pluym, Max Scherer, Jonathan Belsey, Christopher Russell, Pasquale Caponnetto, Pasquale Caponnetto, Jakub Weglarz, Davide Campagna, Davide Campagna