laboratory diagnostic - others - a-1 Antitrypsin, Alpha-1 Antitrypsin, AAT clearance, serum 1ml + 3-days stool specimen. The serum must be sampled on the first day of faecal sample collection. The faecal samples must be sent in supplied upon request or, failing this, in a container in which the tare weight must be specified, refrigerated Nephelometry or Turbidimetry, ssso, todylaboratories®, bmn, code L16LD1587