Fig. 1From: Prevalence of recurrent aphthous stomatitis, oral submucosal fibrosis and oral leukoplakia in doctor/nurse and police officer populationThe prevalence rates of RAS in the non-doctor/nurse and non-police officer group, the police officer group and the doctor/nurse group.* indicates statistically significant differences of overall prevalence with P < 0.05 between the doctor/nurse group and the non-doctor/nurse and non-police officer goupBack to article page