Is IgG4-Related Disease a Cause of Xerostomia? A Cohort Study of 60 Patients

Box 1

Characteristics of subjective dry mouth syndrome according to Vitali et al. [6].

Oral symptoms: positive answer to at least one of the following questions:

(i) Have you had a daily feeling of dry mouth for more than 3 months?

(ii) Have you had recurrently or persistently swollen salivary glands as an adult?

(iii) Do you frequently drink liquids to aid in swallowing dry food?