PLP	phantom limb pain
LLA	lower limb amputation
CNS	central nervous system
OR	odds ratio
CI	confidence interval
AKA	above-knee amputation
BKA	below-knee amputation
BMI	body mass index
ASA PS	American Society of Anesthesiologists Physical Status
NSAID	nonsteroidal anti-inflammatory drug
DM	diabetes mellitus
NRS	numerical rating scale
SD	standard deviation
NMDA	N-methyl-d-aspartate
AMPA	α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid
SOAP	subjective, objective, assessment, and plan