1. Header
     CDA author (1.3.6.1.4.1.32722.77.77.1.10.14)
    1. *
       CDA Assigned Entity Identification (1.3.6.1.4.1.32722.77.77.1.10.15)
    2. *
       CDA represented organization (1.3.6.1.4.1.32722.77.77.1.10.16)