Gene Expression Profiling; Interferon-beta/therapeutic use; Multiple Sclerosis, Relapsing-Remitting/genetics; Multiple Sclerosis, Relapsing-Remitting/immunology; Adult; Antigens, CD/biosynthesis; Antigens, CD/genetics; Antigens, Differentiation, T-Lymphocyte/biosynthesis; Antigens, Differentiation, T-Lymphocyte/genetics; Antiviral Agents/biosynthesis; Antiviral Agents/genetics; Bayes Theorem; Biomarkers/analysis; Female; Gene Expression Profiling/methods; Gene Expression Profiling/statistics & numerical data; Genetic Variation/immunology; Humans; Injections, Intramuscular; Interferon-beta/administration & dosage; Interferon-beta/pharmacology; Janus Kinase 1; Lectins, C-Type; Lymphocyte Activation/genetics; Male; Middle Aged; Multiple Sclerosis, Relapsing-Remitting/metabolism; Polymerase Chain Reaction/methods; Polymerase Chain Reaction/statistics & numerical data; Protein Processing, Post-Translational/immunology; Protein-Tyrosine Kinases/biosynthesis; Protein-Tyrosine Kinases/genetics; RNA, Messenger/biosynthesis; Signal Transduction/genetics; Signal Transduction/immunology