Placebo [clinicaltrials_resource:NCT00000392/group/P2]

Placebo given intranasally at a dosage of 2mg 3 times a day for 6 months Placebo

Placebo [clinicaltrials_resource:NCT00000392/group/P2]

Placebo given intranasally at a dosage of 2mg 3 times a day for 6 months Placebo