RadonAir Pollutants, RadioactiveRadon DaughtersNeoplasms, Radiation-InducedCarcinogens, EnvironmentalLung NeoplasmsAir Pollution, IndoorHousingRadiation MonitoringEnvironmental ExposureLungCase-Control StudiesCarcinoma, Non-Small-Cell LungSmokingDose-Response Relationship, RadiationAir Pollution, RadioactiveSpainMiningRisk AssessmentCarcinoma, Small CellLung DiseasesRisk FactorsUraniumSmall Cell Lung CarcinomaRadioactive PollutantsAdenocarcinomaEarly Detection of CancerCarcinoma, Squamous CellCell Line, Tumor