M Antigen Typing – Patient Macroamylase Determination Magnesium, Plasma or Serum Marfan Syndrome, FBN1 Sequencing Measles (Rubeola) Antibody, IgM, CSF Mephenytoin and Metabolite Quantitative, Serum or Plasma Magnesium, RBC Mast Cell Tryptase by Immunohistochemistry Measles (Rubeola) Virus Culture Meprobamate, Serum or Plasma, Quantitative Magnesium, Urine Maternal Screening, Sequential, Specimen #1 Medium Chain Acyl-CoA Dehydrogenase (ACADM) 2 Mutations Mercury, Hair Malaria Antibody, IgG Maternal Screening, Sequential, Specimen #2 Medium Chain Acyl-CoA Dehydrogenase Deficiency (ACADM) Sequencing Mercury, Nails Malaria Detection and Speciation, Qualitative by Real-Time PCR Maternal Serum Screen, Alpha Fetoprotein (Only)