ED	Erectile Dysfunction
PDE5-Is	Phosphodiesterase Type 5 Inhibitors
BoNT-A	Botulinum Toxin Type A
FDA	U.S. Food and Drug Administration
IIEF	International Index of Erectile Function
SHIM	Sexual Health Inventory for Men
EHS	Erection Hardness Score
CIs	Confidence Intervals
RCT	Randomized Controlled Trial
NO	Nitric Oxide