Salaffi, F.; Farah, S.; Di Carlo, M. Frailty Syndrome in Rheumatoid Arthritis and Symptomatic Osteoarthritis: An Emerging Concept in Rheumatology. Acta Biomed 2020, 91 (2), 274-296. https://doi.org/10.23750/abm.v91i2.9094.