References:

• 1.

  Ship, Jonathan A. (2003, Sept). Xerostomia in older adults: diagnosis and management. Geriatrics & Aging. 6(8):44-8. https://pdfs.semanticscholar.org/e167/7c9fca1139b1cfa8f73b250781685755a483.pdf.

• 2.

  American Dental Association. (2018, Aug). Xerostomia (dry mouth). www.ada.org/en/member-center/oral-health-topics/xerostomia.

• 3.

  Mickenautsch, S., et al. (2007). Sugar-free chewing gum and dental caries: a systematic review. J Appl Oral Sci. 15(2):83-8.