The second stage of Meaningful Use requires that healthcare providers use C-CDA document exchange regularly in care transitions and the CCD has been identified as the most appropriate document for this purpose.
The part of the brain that interprets smell is the olfactory bulb.  This brain structure is usually above the nasal cavity and below  frontal lobe.
From tongue to brainstem. As diagrammed in this image, the three taste nerves and the trigeminal nerve bring their messages to the brainstem, where they combine their signals in areas that are involved with arousal (for example from sleep), and are - according to Antonio Damasio in The Feeling of What Happens - the locus of our sense of core self. Smell and the brain