GTPS	Greater Trochanteric Pain Syndrome
NRS	Numeric Rating Scale
mHHS	Modified Harris Hip Score
MRI	Magnetic Resonance Imaging
PRP	Platelet-Rich Plasma
NSAIDs	Non-Steroidal Anti-Inflammatory Drugs
ECM	Extracellular Matrix
RCT	Randomized Controlled Trial
FU	Follow-Up
T0, T1w, T2w, T6w, T10w, T24w	Time points (Baseline, 1 week, 2 weeks, 6 weeks, 10 weeks, 24 weeks)
COL-I	Type I Collagen
ESHS	External Snapping Hip Syndrome
GCP	Good Clinical Practices
STIR	Short Tau Inversion Recovery (MRI Sequence)
T1	T1-Weighted MRI Imaging
Tönnis Classification	System for grading hip osteoarthritis
MD	Tissue—Swine-derived type I collagen medical device (GUNA S.p.A.)
IRB	Institutional Review Board
OSMAMI	Milano Area 2 Ethics Committee Code
NCT	National Clinical Trial Number