RT Journal Article SR Electronic T1 Why there should be constraints about who performs coronary angioplasty. JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 106 OP 106 DO 10.1136/hrt.76.2.106 VO 76 IS 2 A1 R. Boyle YR 1996 UL http://heart.bmj.com/content/76/2/106.abstract AB