Proving an entitlement to disability benefits on account of pain can be challenging as a recent federal court ruling from Massachusetts recognized.The case of Kamerer v. Unum Life Insurance Company of America, 2018 WL 4539693 (D. Mass., Sept. 21, 2018), involved a claim brought by Judith Kamerer, a former employee of Accenture, who became disabled in 2004 due to fibromyalgia and depression. Her employer’s disability insurer, Unum Life Insurance, approved Kamerer’s claim and paid benefits from 2004 to 2013 …