1. Proof-of-Concept Randomized Controlled Study of Cognition Effects of the Proprietary Extract Sceletium tortuosum (Zembrin) Targeting Phosphodiesterase-4 in Cognitively Healthy Subjects: Implications for Alzheimer's Dementia. (23rd October 2014) Authors: Chiu, Simon; Gericke, Nigel; Farina-Woodbury, Michel; Badmaev, Vladimir; Raheb, Hana; Terpstra, Kristen; Antongiorgi, Joalex; Bureau, Yves; Cernovsky, Zack; Hou, Jirui; Sanchez, Veronica; Williams, Marissa; Copen, John; Husni, Mariwan; Goble, Liz Other Names: Harikumar Kuzhuvelil B. Academic Editor. Journal: Evidence-based complementary and alternative medicine Issue: Volume 2014(2014) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗