Hamilton Rating Scale for Depression Ontology

Hi,

I'm wondering if anyone knows of an ontology that encodes the Hamilton Rating Scale for Depression.

This is for the

Use Case 3:
 Mining Treatment Outcomes<https://docs.google.com/document/d/1ouJ-47qT8YykIhIxFLx5Qg2K0ixQtk5L2vt3lPGHMo8/edit?hl=en_US>

  *   Goal: develop a generic, anonymised, multi-EHS compliant format and an information architecture that allows access to symptom/treatment data as a Linked Data source that can be made freely available and used for drug efficacy/outcome (meta)studies
  *   Status: Description of use case being edited
  *   Leads: Joanne Luciano, Anita de Waard
  *   Partners: RPI, Elsevier, - need clinical/patient forum and/or pharma partner

http://www.w3.org/wiki/HCLSIG/SWANSIOC

Thanks,
Joanne