small intestinal submucosa
Supports Intensity Scale
saline infusion sonography
Saline infusion sonohysterography
secretory immune system
selected ion storage
selective ion storage
serotonin irritation syndrome
sharps injuries
shoulder impingement syndrome
signal intensities
silent infarcts
silver infarct staining
simian sarcoma
simple infertility score
simulator-induced syndrome
skin immune system
small intestine submucosa
social information system
Social Interview Schedule
specialized information system
spontaneous interictal spike
sterile injectable solution
sterile injectable suspension
stimulation indices
Stroke Impact Scale
Structured Interview for Schizotypy
Subacromial impingement syndrome
Suicidal Intent Scale
Suicide Intent Scale
supplemental information seeking
Supplies Information Service
Surgical Infection Society
Surgical Infections Society
surgical information system