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

Association between hypothyroidism and elderly-onset rheumatoid arthritis: A cross-sectional study at national hospital in Peru Paul J. Tejada-Llacsa, Vidia Lumbe Diaz, Carlos Diaz-Arocutipa