Influence of practitioner expertise during early pregnancy diagnosis on pregnancy loss rate: A controlled, blinded trial

1. Patron, R.
2. López-Helguera, I.
3. Sebastián, F.
4. Pesantez-Pacheco, J.-L.
5. Pérez-Villalobos, N.
6. Vicente González Martín, J.
7. Fargas, O.
8. Astiz, S.