8-OHdG	8-hydroxy-desoxyguanosine
ALT	alternative lengthening of telomeres
BMI	body mass index
bp	base pair
CHI3L1	chitinase 3-like protein 1
CIS	clinically isolated syndrome
CMV	cytomegalovirus
CNS	central nervous system
CRP	C-reactive protein
EBNA1	Epstein–Barr virus nuclear antigen 1
EBV	Epstein–Barr virus
EDSS	Expanded Disability Status Scale
GWAS	genome-wide association study
HHV	human herpesvirus
HLA	human leukocyte antigen
H.p.	Helicobacter pylori
HR	hazard ratio
IgG	immunoglobulin G
IM	infectious mononucleosis
kb	kilobase
LD	linkage disequilibrium
LTL	leukocyte telomere length
MHC	major histocompatibility complex
MRI	magnetic resonance imaging
MS	multiple sclerosis
MSSS	Multiple Sclerosis Severity Score
OR	odds ratio
OS	oxidative stress
PA	physical activity
PCR	polymerase chain reaction
PM	particulate matter
PPMS	primary progressive multiple sclerosis
Q-FISH	quantitative fluorescence in situ hybridization
RNA	ribonucleic acid
RR	relative risk
RRMS	relapsing-remitting multiple sclerosis
S	single-copy gene signal
SAA	serum amyloid A
SASP	senescence-associated secretory phenotype
SD	standard deviation
SMD	standardized mean difference
SNP	single-nucleotide polymorphism
SPMS	secondary progressive multiple sclerosis
T	telomere signal
TERC	telomerase RNA component
TERT	telomerase reverse transcriptase
TeSLA	telomere shortest length assay
TL	telomere length
TRF	terminal restriction fragment
U-STELA	universal single telomere length analysis