What are cognitive tests and how easy are they? - BBC.com
- What are cognitive tests and how easy are they? BBC.com
- Biden interviewers shed light on his frailty behind the scenes: 'It's impossible not to notice' Fox News
- One of Biden’s ‘closest friends’ wants him to take a ‘complete neurological exam,’ president’s biographer reveals New York Post
- President Joe Biden saw neurologist at White House for Jan. 17 exam, press secretary says The Associated Press
- Biden biographer: President’s close friend wants him to get neurological exam CNN