Sjoegren syndrome 20 Sjogren's Syndrome controlled study 20 article 18 female 18 priority journal 18 Animals 16 Mice 16 Mice, Inbred BALB C 16 Mice, Inbred NOD 16 Vasoactive Intestinal Peptide 16 mouse 16 nonhuman 16 Female 14 animal experiment 14 animal model 14 vasoactive intestinal polypeptide 14 Apoptosis 12 animal tissue 12 apoptosis 12 protein expression 12 Tumor Necrosis Factor-alpha 10 animal cell 10 enzyme activity 10 macrophage 10 submandibular gland 10 tumor necrosis factor alpha 10 Disease Models, Animal 8 Macrophages 8 Submandibular Gland 8