BD	Bipolar Disorder
CRP	C-reactive Protein
FM	Fibromyalgia
GRADE	Grades of Recommendation, Assessment, Development, and Evaluation
HC	Healthy Controls
HPA	Hypothalamic–Pituitary–Adrenal
IL-6	Interleukin-6
LD	Linear Dichroism
MDD	Major Depressive Disorder
NAC	N-Acetylcysteine
PNEI	Psycho Neuro-Endocrine Immunology
PRDM	Psychology of Reasoning and Decision-Making
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
RCTs	Randomized Controlled Trials
SLE	Systemic Lupus Erythematosus
SNRI	Serotonin-Norepinephrine Reuptake Inhibitor
SSRI	Selective Serotonin Reuptake Inhibitor
TLA	Three-Letter Acronym
TNF-α	Tumor Necrosis Factor-alpha