There are multiple definitions:

1. low-frequency stimulation(English)

   • for treatment of epilepsy
   • LFS-K, HFS, LTD, LTP, PAG
   • Epilepsy or syncope, Therapeutic approaches
   • https://doi.org…55/2017/8623743

2. Li-Fraumeni syndrome(English)

   • increases greatly the susceptibility to cancer
   • HME, HMS, TP53
   • Oncology, Mammary gland
   • https://doi.org…cotarget.101004

3. leukemia free survival(English)

   • Leukemia, Prognosis
   • https://doi.org…408-021-00516-1

4. left ventricle shortening rate(English)

   • PCI, QOL, STEMI, TCM, VEGF, WM
   • Cardiology
   • https://doi.org…55/2022/4008966