title: Introduction.
authors.affiliation: The Chaim Sheba Medical Center, Tel Hashomer, Israel. spiegel@sheba.health.gov.il
authors.forename: Roberto
authors.initials: R
authors.lastname: Spiegelmann
mesh_terms: D003299:Cooperative Behavior; D006801:Humans; D009369:Neoplasms / Q000601:surgery*; D016634:Radiosurgery / Q000379:methods*