title: Reply to Riquet et al.
authors.affiliation: Department of Thoracic Surgery, Strasbourg University Hospital, Strasbourg, France sterenaud0@gmail.com.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Renaud
authors.affiliation: Department of Thoracic Surgery, Strasbourg University Hospital, Strasbourg, France.
authors.forename: Elena
authors.initials: E
authors.lastname: Garelli
authors.affiliation: Department of Thoracic Surgery, Strasbourg University Hospital, Strasbourg, France.
authors.forename: Pierre-Emmanuel
authors.initials: PE
authors.lastname: Falcoz
authors.affiliation: Department of Thoracic Surgery, Strasbourg University Hospital, Strasbourg, France.
authors.forename: Gilbert
authors.initials: G
authors.lastname: Massard
keywords: Lung cancer; N2