Nicotine and SARS-CoV-2: COVID-19 may be a disease of the nicotinic cholonergic system - Farsalinos, Konstantinos; Niaura, Raymond; Le Houezec, Jacques; Barbouni, Anastasia; Tsatsakis, Aristidis; Kouretas, Dimitrios; Vantarakis, Apostolos; Poulas, Konstantinos (Elsevier, 2020)