Читать книгу Interventional Cardiology - Группа авторов - Страница 154

One essential is that the trial is comparative (i.e. one needs a control group of patients receiving a standard treatment who will be compared with patients receiving the new treatment). Such standard treatment can either be an established active treatment or no treatment (possibly a placebo). Of course, all patients in both groups must have good medical care in all other respects.