The present invention is based on the unexpected discovery that the loss of cells in inflamed tissue during chronic inflammation leads to the influx and long-term re-population of the tissue with bone marrow derived stem cells, and that it is these stem cells that are the primary source of metaplasia and cancer. The indicator includes a front panel configured to be located on an outside surface of a door. There is also disclosed a fuel additive comprising an alloy; a fuel composition comprising the fuel additive composition; methods of making the fuel additive composition; and methods of using the disclosed alloy. A drive is fixedly secured to the guide rail for selectively driving the slide mechanism along the guide rail. The module includes a cable less than 1 meter long, the ends of which are fitted with two aircraft contacts, two standard connectors compatible with standard test equipment, and a mechanism simulating attenuation of a test cable.