Are symptom features of depression during pregnancy, the postpartum period and outside the peripartum period distinct? Results from a nationally representative sample using item response theory (IRT)

1. Hoertel, N.
2. Lõpez, S.
3. Peyre, H.
4. Wall, M.M.
5. González-Pinto, A.
6. Limosin, F.
7. Blanco, C.