Methotrexate in Patients With Rheumatoid Arthritis in Spain: Subanalysis of the AR Excellence Project Jesús Tornero-Molina, José Luis Andreu, María-Auxiliadora Martín-Martínez, Héctor Corominas, José Javier Pérez Venegas, José Andrés Román-Ivorra, Fernando Sánchez-Alonso

Autoantibodies to extractable nuclear antigens (ENAs) pattern in rheumatoid arthritis patients: Relevance and clinical implications Yasser Emad, Yasser Ragab, Nevin Hammam, Nashwa El-Shaarawy, Ossama Ibrahim, Rania M. Gamal, Magdy Abd-Elsalam, Reem H.A. Mohammed, Mona Hawass, Johannes J. Rasker

The association between smoking and the development of rheumatoid arthritis: a population-based case-control study Júlia Sánchez-Campamà, Navraj S. Nagra, Marta Pineda-Moncusí, Albert Prats-Uribe, Daniel Prieto-Alhambra