A randomized trial evaluating the efficacy and the safety of ENA 713 (rivastigmine tartrate), a new acetylcholinesterase inhibitor, in patients with mild to moderately severe Alzheimer’s disease - Corey-Bloom, J; Anand, R; Veach, J; for the ENA 713 B352 Study Group (Int J Geriatr Psychopharmacol, 1998)