JOURNAL OF THE EUROPEAN ACADEMY OF DERMATOLOGY AND VENEREOLOGY, vol.16, no.1, pp.66-67, 2002 (SCI-Expanded, Scopus)
Background The exact aetiology of recurrent aphthous stomatitis (RAS) is still unknown, but different predisposing factors, including iron, vitamin B 12 and folic acid deficiencies, have been proposed.