A method of humidifying a gas that includes supplying a gas to a surface of a humidification material that readily absorbs moisture and readily releases moisture when exposed to a dry environment and generating turbulence in the gas as it passes over the surface of the humidification material. The devices are generally pliable and collapsible thin film devices which can be delivered via a microcatheter into the desired location where they are deployed and undergo either a shape memory phase transformation or in situ polymerization to assume the stable configuration of a permanent endoluminal prosthesis. There is provided a refrigerant introduction pipe for introducing refrigerant in the hermetic shell case over the electric element into the second rotary compression element through an outside of the hermetic shell case. Specific animal models of lung cancer are described as well as methods for evaluating diagnostic and therapeutic agents for treating lung cancer.