Here are some helpful links:

National Aphasia Association: https://www.aphasia.org/aphasia-faqs/

Lee Silverman Voice Treatment: https://www.lsvtglobal.com/LSVTLoud

Parkinson’s Disease: https://www.parkinson.org/

Alzheimer’s Association: https://www.alz.org/

American Speech Language and Hearing Association: https://www.asha.org/