Its at
http://www.sjogrens.org/homeAlso out of curiosity I was googling w Google Scholar your syndrome and when I read that Sjogren's is an auto-immune disease I immediately thought of Vitamin D because it role in immune disorders is being studied extensively.
Below are some quotes from a study about Vit D deficiency and Connective Tissue Diseases such as SS. But before embarking on supplementation
its probably best to print the study to show to your doctor.
"Data in our study as well as those reported by others suggest that UCTD may develop into any well-defined CTDs <16-18>. Evolution into a specific established CTD was found in 21.7% of patients with UCTD during the follow-up period. UCTD most frequently progressed into RA, and SLE, Sjögren syndrome, and MCTD had about the same prevalence. Interestingly, the lowest levels of vitamin D (<30 ng/mL) were measured in UCTD patients who subsequently evolved to defined CTDs
snip
"Vitamin D has a pivotal role in the maintenance of immune homeostasis. In various systemic autoimmune diseases, low levels of vitamin D have been described previously. We showed that, in patients with UCTD, serum levels of vitamin D were significantly lower compared with healthy individuals. Moreover, critically low levels of the vitamin clearly correlated with the progression to well-established CTDs. Our findings support the idea that vitamin D may be a key regulator of autoimmune processes in patients with UCTD
http://arthritis-research.com/content/10/5/R123I hope the information might be useful.