Sjogrens Syndrome as primary cause of fibro, migraines and other chronic symptoms

I am looking for someone to assemble a paper with peer reviewed research supporting the fact that the auto-immune disease Sjogrens Syndrome caused chronic muscle joint pain, migraines as well as the other more well known symptoms. My wife is pursuing an appeal of denial for long term disability and need help assembling this proof for our appeal that must be filed before September.