Yaegaki K, Ogura R, Kameyama T, Sujaku C
Int J Oral Surg. 1985 Feb;14(1):47-9. doi: 10.1016/s0300-9785(85)80009-0.
The volume of the secretion of saliva is decreased in elderly people. The volume of salivary secretion varies directly with acid DNase activity. Neutral DNase activity, however, shows no significant variation.