Ginkgo biloba extract and long-term cognitive decline: a 20-year follow-up population-based study. User shrillthrill, in the Nootropics subreddit, 07 Jul 2013
Ginkgo Biloba Extract and Piracetam on Long-Term Cognitive Decline: A 20-Year Follow-Up Population-Based Study User ZombieChalmers, in the Nootropics subreddit, 02 Feb 2013