RT Journal Article SR Electronic T1 Review: donepezil, metrifonate, rivastigmine, and Ginkgo biloba are more effective than placebo in Alzheimer's disease JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 14 OP 14 DO 10.1136/ebm.6.1.14 VO 6 IS 1 YR 2001 UL http://ebm.bmj.com/content/6/1/14.abstract AB