Defining Percutaneous Coronary Intervention Complexity and Risk: An Analysis of the United Kingdom BCIS Database 2006-2016. - Protty M; Sharp ASP; Gallagher S; Farooq V; Spratt JC; Ludman P; Anderson R; McEntegart MM; Hanratty C; Walsh S; Curzen N; Smith E; et al. (JACC. Cardiovascular interventions, 2022)