There are multiple definitions:

1. high-frequency stimulation(English)

   • LTD, LTP, PAG

2. hemifacial spasm(English)

   • is characterized by unilateral, intermittent contractions of the muscles of facial expression, which typically begins in the orbicularis oculi and spreads to the other muscles of expression over several years
   • REZ
   • Neuropathy
   • https://doi.org…s.2007.42.5.355

3. hypoglycemia fear survey(English)

   • HFS-P-YC, PHLOC, PSI, PSI-SF, YC
   • Insulin, Anxiety/fear
   • https://doi.org…55/2019/7935945

4. hand-foot syndrome(English)

   • ALT, AST, HCC
   • Adverse effect, Chemotherapy, Liver disease
   • http://pubmed.n…h.gov/28039697/