Hyun-Jung LEE, et al. “A Case of Primary Sjögren’s Syndrome Presenting As Mass-Like Encephalitis, With Progression to Neuromyelitis Optica Spectrum Disorder”. Archives of Rheumatology, vol. 32, no. 4, Dec. 2017, pp. 353-7, doi:10.5606/ArchRheumatol.2017.6201.