Why we need observational studies to evaluate the effectiveness of health care.
Why we need observational studies to evaluate the effectiveness of health care. — المؤلف: Black, N — BMJ (Clinical research ed.) 19960705
- المؤلف
- Black, N
- النشر
- BMJ (Clinical research ed.) 19960705
- الوصف
- 1215-8 p.
- الموضوعات
- Data Collection؛ Health Services Research؛ Humans؛ Liability, Legal؛ Politics؛ Randomized Controlled Trials as Topic؛ Research؛ Treatment Outcome