If the samples were continuously frozen, they should be stable for years. I would recommend the miRVana Kit (Ambion), its quite efficient for microRNA extraction from serum/plasma. Serum/Plasma volume between 170 - 400 µl is recommendet for microRNA analysis.
If the samples were continuously frozen, they should be stable for years. I would recommend the miRVana Kit (Ambion), its quite efficient for microRNA extraction from serum/plasma. Serum/Plasma volume between 170 - 400 µl is recommendet for microRNA analysis.