Lack of response may indicate incorrect diagnosis, concurrent deficiencies, or inadequate treatment frequency
Community Dent Oral Epidemiol
It simply means that the "first-line" screening didn't find a significant abnormality
Also, the established diagnostic indicators present in AD are seen in other forms of dementia including frontotemporal, vascular, diffuse Lewy body, corticobasal, dementia due to Parkinsons disease, type 2 diabetes, and HIV infection, as well as normal aging [31]
So platelet-rich plasmathe studies that I did on it involved arthritis, specifically of the shoulder joint, and tendonitis or tendinopathy in various parts of the body