Mitral valve replacement with St. Jude medical prosthesis and low-dose anticoagulation in patients aged over 50 years [2] (multiple letters)

1. Sierra-Quiroga, J.
2. Rubio-Alvarez, J.
3. Duran-Munoz, D.
4. Garcia-Bengochea, J.B.
5. Katircioglu, S.F.
6. Yamak, B.
7. Ulus, A.T.