There are multiple definitions:

1. no abstract available(English)

   • bias, FUTON
   • Biomedical journals, Medical publications

2. N-acetyl aspartate(English)

   • MRS

3. North American Artery Society(English)

   • professional society dedicated to the encouragement, support, and understanding of vascular structure and function and its application to clinical medicine
   • Vessel properties, Hemodynamics
   • http://www.naartery.org/