There are multiple definitions:
sacrum pubic posterior angle(English)
- morphologic radiological parameter in assessing pelvic sagittal alignment in human adults
- FSPA, PI, PRS1
- Spine (or spinal cord), Medical imaging
- https://doi.org…0586-014-3300-4
SMS reminders in Pharmaceutical care of Patients' adherence to Antihypertensives(English)