Lung cancer treatment is influenced by income, education, age and place of residence in a country with universal health coverage

- Nilssen, Yngvar; Strand, Trond-Eirik; Fjellbirkeland, Lars; Bartnes, Kristian; Brustugun, Odd Terje; O'Connell, Dianne L.; Yu, Xue Qin; Møller, Bjørn