AA	Alopecia Areata
ADA/ADL	Adalimumab
AE	Adverse Events
AM	Amplitude Modulation
AS	Ankylosing Spondylitis
BDI	Beck Depression Inventory
BBB	Blood–Brain Barrier
CD	Crohn’s Disease
CNS	Central Nervous System
CRP	C-Reactive Protein
CT	Computed Tomography
CZP	Certolizumab Pegol
DAS28	Disease Activity Score 28
ETA	Etanercept
EQ-5D	EuroQol 5 Dimensions Questionnaire
FACIT-F	Functional Assessment of Chronic Illness Therapy-Fatigue
FDA	Food and Drug Administration
GLM	Golimumab
HAQ	Health Assessment Questionnaire
HADS	Hospital Anxiety and Depression Scale
HPA	Hypothalamic–Pituitary–Adrenal
IBD	Inflammatory Bowel Disease
IDO	Indoleamine 2,3-Dioxygenase
IgG	Immunoglobulin G
IL	Interleukin
IL-6	Interleukin-6
IL-6R	Interleukin-6 Receptor
mAb	Monoclonal Antibody
MRI	Magnetic Resonance Imaging
MTX	Methotrexate
PCS	Physical Component Summary
PHQ-9	Patient Health Questionnaire-9
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
PROs	Patient-Reported Outcomes
QoL	Quality of Life
RA	Rheumatoid Arthritis
SARI	Sarilumab
SF-36	Short Form Health Survey 36
SRK	Sirukumab
TCZ	Tocilizumab
TNF	Tumor Necrosis Factor
TNF-α	Tumor Necrosis Factor-alpha
UC	Ulcerative Colitis
VAS	Visual Analog Scale
WOMAC	Western Ontario and McMaster Universities Osteoarthritis Index