serum English serum serum serum serum English serum serum serum serum English Serum English blood serum English serum English serum serum serum serum Serum Serum serum blood serum serum serum serum serum serum serum serum English serum serum serum serum English Serum serum serum blood serum serum serum Blood Serum serum serum blood serum English serum blood serum English serum English English English serum blood serum English English serum https://en.wikipedia.org/wiki/Serum_%28blood%29 serum serum plasma, antibodies, and non-clotting proteins Serum blood serum serum serum Serum (blood) su Wikipedia inglese Serum English serum English English sera serum English serum English blood serum English serum serum