Stridsberg , Mats, Tom Pettersson, and Kim Pettersson. 1997. “A Two-Site Delfia Immunoassay for Measurements of the N-Terminal Peptide of Pro-Atrial Natriuretic Peptide (nANP)”. Upsala Journal of Medical Sciences 102 (2):99-108. https://doi.org/10.3109/03009739709178934.