Erratum to: Surgical Treatment of Bilateral Lung Cancers: Long-Term Outcomes and Prognostic Factors - Petrella, Francesco; Frassoni, Samuele; Bagnardi, Vincenzo; Casiraghi, Monica; Brambilla, Daniela; Diotti, Cristina; Spaggiari, Lorenzo (The Thoracic and Cardiovascular Surgeon, 2019)