title: Reply to the letter to the editor 'How much evidence isn't in evidence-based guidelines?' by Johnson et al.
authors.affiliation: Department of Medical Oncology, Cancer Pain and Palliative Medicine Service, Shaare Zedek Medical Center, Jerusalem, Israel.
authors.forename: N I
authors.initials: NI
authors.lastname: Cherny
authors.affiliation: Department of Palliative Medicine and Institute for Palliative Care, Kliniken Essen-Mitte, Academic Teaching Hospital University Essen-Duisburg, Essen, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Kloke
authors.affiliation: Department of Hematology and Medical Oncology, Biomedical Research Institute INCLIVA, University of Valencia, Valencia, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Cervantes
authors.affiliation: Department of Medical Oncology, University of Ioannina, Ioannina, Greece clinicalguidelines@esmo.org.
authors.forename: G
authors.initials: G
authors.lastname: Pentheroudakis
mesh_terms: D004417:Dyspnea / Q000473:pathology*; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology*