F. Bardazzi, M. Starace, F. Bruni, M. Magnano, B. M. Piraccini, and A. Alessandrini, “Nail Psoriasis: An Updated Review and Expert Opinion on Available Treatments, Including Biologics”, Acta Derm Venereol, vol. 99, no. 6, pp. 516–523, Mar. 2019.