EthaneHealth Care CostsCosts and Cost AnalysisDDTDichlorodiphenyldichloroethaneMesylatesDrug CostsCost of IllnessDichlorodiphenyl DichloroethyleneHydrocarbons, AcyclicCost ControlAntispermatogenic AgentsMethoxychlorEthylene DichloridesChlorofluorocarbons, EthaneLeydig CellsDirect Service CostsEthyl ChlorideDicofolAcetyleneSaturnCost SharingPentanesCost-Benefit AnalysisHydrocarbons, ChlorinatedCost AllocationMethane