ACE and glycogen storage disease VI: CSF = cerebral spinal fluid; WBC = white blood cell; RBC = red blood cell; ACE = angiotensin converting enzyme; ANA = antinuclear antibody; CRP = C-reactive protein; INR = international normalized ratio; AcH = acetylcholine; N/A = not applicable; CFU = colony forming units; COVID-19 = coronavirus disease 2019