LARC	Locally advanced rectal cancer
CRT	Chemoradiotherapy
MiR	MicroRNA
MiR-31	MicroRNA-31
FFPE	formalin-fixed paraffin-embedded
5-FU	5-fluorouracil
pCR	pathological complete response; ypT0N0
CRC	colorectal cancer
anti-EGFR	anti-epithelial growth factor receptor
RT-PCR	quantitative real-time polymerase chain reaction
PPP2R2A	regulatory subunit B alpha isoform of the tumor suppressor PP2A
MRI	Magnetic resonance image
TRUS	Transrectal ultrasound
FBCT	full body computed tomography scan
REMARK	Reporting Recommendations for Tumor Marker Prognostic Studies