Abbreviation for hypothalamus

Donald Price uses HT as an abbreviation for hypothalamus in the following article:

Price, D.D. (2000) Psychological and Neural Mechanisms of the Affective Dimension of Pain. Science, 288, 1769-1772. [doi: 10.1126/science.288.5472.1769]

I have also seen it abbreviated to HYP and HYPO.