Anosmia was verified in males by absence of cfos staining (no neural activation) in the inner cellular layer of the olfactory bulb, indicating no transmission of sensory information from the olfactory epithelium to the olfactory bulb when the olfactory nerves were severed (see Figure 6 for example cfos staining in the olfactory bulb). The gene discussed is FOS; the disease is Kallmann syndrome.