Background: In intervention trials, only randomization guarantees equal distributions of all known and unknown patient characteristics between an intervention group and a control group and enables ...
Introduction: Due to safety concerns about available antiarrhythmic drugs (AADs), reliable agents for termination of atrial fibrillation (AF) are requisite. Objectives: The aim of the study was to ...
Cyclophosphamide Compared With Ifosfamide in Consolidation Treatment of Standard-Risk Ewing Sarcoma: Results of the Randomized Noninferiority Euro-EWING99-R1 Trial A retrospective data set including ...
1. Black N: Why we need observational studies to evaluate the effectiveness of health care. BMJ 1996; 312:1215–8 CrossRef 2. McKee M, Britton A, Black N, McPherson K, Sanderson C, Bain C: Methods in ...