1. Primary Sjögren's syndrome: a subjective description of the disease;Bjerrum;Clin Exp Rheumatol,1990
2. Oral pilocarpine for post-irradiation xerostomia in patients with head and neck cancer;Johnson;New Engl J Med,1993
3. Reference guide to drugs and dry mouth;Sreebny;Gerontology,1986
4. Drug-induced xerostomia;Butt;J Can Dent Assoc,1991