Here's the article. It's unclear what the doses were, the authors apparently got everyone up to 30 mg./day but apparently tried to go higher:
A final target dose of 30 mg/d was defined and was applicated [sic] twice a day (15 mg/morning and 15 mg/evening). After arriving at the dose of 30 mg/d without any serious side effects, further increase of the daily intake was possible.
I am frankly surprised that they achieved their rather impressive results, albeit in a small sample, with only 30 mg./day, unless for some reason they're not comfortable discussing the actual therapeutic doses. In any event, here it is.
Mike