The quality of nifedipine studies used to assess tocolytic efficacy: A systematic review

1. Lamont, R.F.
2. Khan, K.S.
3. Beattie, B.
4. Roura, L.C.
5. Di Renzo, G.C.
6. Dudenhausen, J.W.
7. Helmer, H.
8. Svare, J.
9. Van Geijn, H.P.