In a hydraulic tensioner, a deairing valve unit comprising a synthetic resin ball guide, a check ball a biasing spring, a ball seat, and a retaining disc, is press-fit into a hollow plunger, and disposed adjacent the protruding end of the plunger. The method comprises administering to said patient a therapeutically effective amount of both a N-alkyl derivative of deoxynojirimycin and a glucocerebrosidase enzyme to alleviate or inhibit the glycolipid storage disease. The band is adjustable such that it can be configured by a user to contact the head of the user at a first location near a temple, a second location along a portion of the user’s ear adjacent the temple, and at a third location along a rear portion of the head of the user.