Operator volume as a "risk factor".
Kimmel
S E
SE
Kolansky
D M
DM
D015906:Angioplasty, Balloon, Coronary / Q000009:adverse effects* / Q000592:standards / Q000706:statistics & numerical data*; D002983:Clinical Competence / Q000706:statistics & numerical data*; D006801:Humans; D017063:Outcome Assessment, Health Care; D010818:Practice Patterns, Physicians' / Q000592:standards*; D012307:Risk Factors