title: Ketamine: to be or not to be.
authors.affiliation: Pain relief and palliative care unit, La Maddalena Cancer Center Palermo, Via San Lorenzo 312, 90146, Palermo, Italy. terapiadeldolore@lamaddalenanet.it or 03sebelle@gmail.com.
authors.forename: Sebastiano
authors.initials: S
authors.lastname: Mercadante