Core items to be included in a definition of moderate psoriatic arthritis: literature review and expert opinion

1. Urruticoechea-Arana, A.
2. Álvarez-Vega, J.L.
3. García-Vivar, M.L.
4. Pinto-Tasende, J.A.
5. García de Yébenes, M.J.
6. Carmona, L.
7. Queiro, R.