Vancomycin-Resistant Enterococcus (VRE) Culture Vanillylmandelic Acid (VMA) and Homovanillic Acid (HVA), Urine Vanillylmandelic Acid (VMA), Urine Varicella-Zoster Virus and Herpes Simplex Virus DFA with Reflex to Varicella-Zoster Virus Culture and Herpes Simplex Virus Culture Varicella-Zoster Virus Antibodies, IgG and IgM Varicella-Zoster Virus Antibody, IgG Varicella-Zoster Virus Antibody, IgG, CSF Varicella-Zoster Virus Antibody, IgM Varicella-Zoster Virus Antibody, IgM by ELISA (CSF) Vaginal Pathogen Panel by DNA Probe Varicella-Zoster Virus by PCR Valproic Acid Valproic Acid, Free and Total Vanadium Quantitative, Serum or Plasma Vancomycin, Peak Level Vancomycin, Random Level Vancomycin, Trough Level Venlafaxine and Metabolite, Serum or Plasma Viscosity, Serum Venous Thromboembolism (VTE), Qualitative