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Farsalinos, Konstantinos and Bagos, Pantelis G and Giannouchos, Theodoros and Niaura, Raymond and Barbouni, Anastasia and Poulas, Konstantinos (2021) Smoking prevalence among hospitalized COVID-19 patients and its association with disease severity and mortality: an expanded re-analysis of a recent publication. Harm Reduction Journal, 18, p. 9. doi: 10.1186/s12954-020-00437-5.