PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-analyses
PICOTS	Population, Intervention, Comparison, Outcome, Timing, and Setting
SP	Subtotal Petrosectomy
ET	Eustachian Tube
BSC	Blind Sac Closure
EAC	External Auditory Canal
CT	Computed Tomography
MRI	Magnetic Resonance Imaging
DWI	Diffusion-Weighted Imaging
SEMAC	Slice Encoded Metal Artifact Correction
MAVRIC	Multi-Acquisition Variable-Resonance Image Combination
CWD	Canal-Wall Down
FC	Fallopian Canal
CI	Cochlear Implant
BAHA	Bone-Anchored Hearing Aids
AMEI	Active Middle Ear Implants
MET	Middle Ear Transducer
DACS	Direct Acoustic Cochlear Stimulator
RCT	Randomized Controlled Trial
NRCT	Non-Randomized Controlled Trial