Reduced sulfation of muc5b is linked to xerostomia in patients with Sjögren syndrome Alliende, C.; Kwon, Y.-J.; Brito, M.; Molina, C.; Aguilera, S.; Pérez, P.; Leyton, L.; Quest, A.F.G.; Mandel, U.; Veerman, E.C.I.; Espinosa, M.; Clausen, H.; Leyton, C.; Romo, R.; González, S.