1. Keitel W, Spieler C (1989) The Saxon test for objective assessment xerostomia. A contribution to the diagnosis of Sjogren’s syndrome. Z Gesamte Inn Med 44:340–341
2. Kanehira T, Yamaguchi T, Takehara J, Kashiwazaki H, Abe T, Morita M, Asano K, Fujii Y, Sakamoto W (2009) A pilot study of a simple screening technique for estimation of salivary flow. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 108:389–393
3. Longman LP, McCracken CF, Higham SM, Field EA (2000) The clinical assessment of oral dryness is a significant predictor of salivary gland hypofunction. Oral Dis 54:263–267
4. Manjunath BC, Praveen K, Chandrashekar BR, Vatchala Rani RM, Bhalla A (2011) Periodontal infections: a risk factor for various systemic diseases. Natl Med J India 24:214–219
5. Detert J, Pischon N, Burmester GR, Buttgereit F (2010) The association between rheumatoid arthritis and periodontal disease. Arthritis Res Ther 12:218. Epub 2010 Oct 22