PalliativeProcedure stemming from 2 parent Types.

Should PalliativeProcedure really be classified as both a Therapy and
Procedure ?  I am ok with saying that out loud... however, I don't see the
need to really even express that in Schema.org.

What do others think ?  Shall we keep it under MedicalTherapy to ease usage
and clean things up ?

Thing <http://health-lifesci.schema.org/Thing> > MedicalEntity
<http://health-lifesci.schema.org/MedicalEntity> > MedicalProcedure
<http://health-lifesci.schema.org/MedicalProcedure> > TherapeuticProcedure
<http://health-lifesci.schema.org/TherapeuticProcedure> > MedicalTherapy
<http://health-lifesci.schema.org/MedicalTherapy> > PalliativeProcedure
<http://health-lifesci.schema.org/PalliativeProcedure>

MedicalProcedure <http://health-lifesci.schema.org/MedicalProcedure>

   - DiagnosticProcedure
   <http://health-lifesci.schema.org/DiagnosticProcedure>
   - *PalliativeProcedure*
   <http://health-lifesci.schema.org/PalliativeProcedure>
   - PhysicalExam <http://health-lifesci.schema.org/PhysicalExam>
   - SurgicalProcedure <http://health-lifesci.schema.org/SurgicalProcedure>
   - TherapeuticProcedure
   <http://health-lifesci.schema.org/TherapeuticProcedure>
      - MedicalTherapy <http://health-lifesci.schema.org/MedicalTherapy>
         - OccupationalTherapy
         <http://health-lifesci.schema.org/OccupationalTherapy>
         - *PalliativeProcedure*
         <http://health-lifesci.schema.org/PalliativeProcedure>
         - PhysicalTherapy
         <http://health-lifesci.schema.org/PhysicalTherapy>
         - RadiationTherapy
         <http://health-lifesci.schema.org/RadiationTherapy>
         - RespiratoryTherapy
         <http://health-lifesci.schema.org/RespiratoryTherapy>