The present invention concerns the discovery that proteins encoded by a family of vertebrate genes, termed here hedgehog-related genes, comprise morphogenic signals produced by embryonic patterning centers, and are involved in the formation of ordered spatial arrangements of differentiated tissues in vertebrates. A first end of the elongate rod is to be connected to and driven by a drive device, and a second end of the elongate rod is connected integrally to the first end. The bullnose region has an exterior radius of 0. Form an inwardly tapered depression in the patterned underlayers down to the buffer layer by either ion milling through a mask or a stencil lift off technique. The method may also include receiving selections of the keys from the generated keys, and generating, by a processor, virtual room pools by grouping the selected keys for each of the selections and the inventory records identified by the selected keys for each of the selections.