Vancomycin, Trough Level 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 Vasoactive Intestinal Peptide Virilization Panel 2 Venlafaxine and Metabolite, Serum or Plasma