There are multiple definitions:

1. structured therapy interruption(English)

   • HAART, LTNP
   • Therapeutic approaches

2. sexually transmitted infection(English)

   • RC, VAM
   • Sexuality, Transmissible disease
   • https://doi.org…905-021-01441-y

3. systolic time interval(English)

   • LVET, PEP, QS2, SEI
   • Cardiology, Electrophysiology

4. surgery time interval(English)

   • versus clinico-pathological factors
   • CNB, ER, SRS, HER2, TN
   • Surgery, Mammary gland, Oncology
   • https://doi.org…2885-015-1853-1