WBC, white blood cells; AST, aspartate aminotransferase; ALT, alanine aminotransferase; ALP, alkaline phosphatase; PTH, parathyroid hormone; 25-OH vitamin D, 25-hydroxyvitamin D; T3, triiodothyronine; T4, tetraiodothyronine; TSH, thyroid-stimulating hormone; FSH, follicle-stimulating hormone; HbA1c, hemoglobin A1c; CSF, cerebrospinal fluid; HIV, human immunodeficiency virus; VDRL, venereal disease research laboratory; ANA, antinuclear antibody; NA, not available. The gene discussed is GPT; the disease is glycogen storage disease VI.