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Carnevale, Roberto; Sciarretta, Sebastiano; Violi, Francesco; Nocella, Cristina; Loffredo, Lorenzo; Perri, Ludovica; Peruzzi, Mariangela; Marullo, Antonino G.M.; De Falco, Elena; Chimenti, Isotta; Valenti, Valentina; Biondi-Zoccai, Giuseppe; Frati, Giacomo . (2016). Acute impact of tobacco versus electronic cigarette smoking on oxidative stress and vascular function. Chest, (), S0012369216485624–. doi:10.1016/j.chest.2016.04.012 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research