This page shows the publications co-authored by Keith Johnson and David Perez.
You don't say: dynamic aphasia, another variant of primary progressive aphasia? J Alzheimers Dis. 2013; 34(1):139-44.
The connection strength for co-authors is the sum of the scores for each of their shared publications.
Publication scores are based on many factors, including how long ago they were written and whether the person is a first or senior author.