There are multiple definitions:
antinuclear antibody(English)
American Neurological Association(English)
- the professional ally of physicians and researchers who strive to make a difference through careers that combine neurological discovery, education, and clinical care
- ACTN
- Neurology, Organizations (scientific)
- https://myana.org/
American Nurses Association(English)
American Nutraceutical Association(English)
- established in February 1997 with a straightforward mission: to develop and provide educational materials and program on nutraceuticals an nutrition for health care professionals, consumers and sales associates from nutraceutical companies
- Nutrition, Organizations (documentation)
- https://www.omi…al-association/