This is a "connection" page, showing publications co-authored by Philip Costello and Andrew Hardie.
Metrix Matrix: A Cloud-Based System for?Tracking Non-Relative Value Unit Value-Added Work Metrics. J Am Coll Radiol. 2018 03; 15(3 Pt A):415-421.
The connection strength for concepts is the sum of the scores for each matching publication.
Publication scores are based on many factors, including how long ago they were written and whether the person is a first or senior author.