title: Childhood cancer and power lines: results depend on chosen control group.
authors.forename: Leeka
authors.initials: L
authors.lastname: Kheifets
authors.forename: Maria
authors.initials: M
authors.lastname: Feychting
authors.forename: Joachim
authors.initials: J
authors.lastname: Schüz
mesh_terms: D002648:Child; D035061:Control Groups; D004574:Electromagnetic Fields / Q000009:adverse effects*; D004781:Environmental Exposure / Q000009:adverse effects*; D006801:Humans; D009381:Neoplasms, Radiation-Induced / Q000209:etiology*; D012111:Residence Characteristics