1536 / 1983
But:
• All studies carry methodological biases: selection criteria, non-
matched comparisons, longevity (Neyman) biases
• Very few data on long follow-up (> 10 year)
• High risk of CBC
|
|
1536 / 1983
But:
• All studies carry methodological biases: selection criteria, non-
matched comparisons, longevity (Neyman) biases
• Very few data on long follow-up (> 10 year)
• High risk of CBC