1. Header
     BC CDA author (2.16.840.1.113883.3.51.60.1.4)
    1. Header
       BC CDA Person (2.16.840.1.113883.3.51.60.1.5.2)
    2. Entry
       BC CDA Device (2.16.840.1.113883.3.51.60.1.21)