Lowering the age at menarche and risk of early menarche in a population of Spanish postmenopausal women during the past two decades

1. Mendoza, N.
2. Galliano, D.
3. Salamanca, A.
4. Castro, J.E.R.
5. Mozas, J.
6. Sánchez-Borrego, R.
7. Quereda, F.
8. Vázquez, F.
9. Martínez-Astorquiza, T.