Gonzalez-Pinto A, Vieta E, Reed C, Novick D, Barraco A, Aguado J, Haro JM. Effectiveness of olanzapine monotherapy and olanzapine combination treatment in the long term following acute mania--results of a two year observational study in bipolar disorder (EMBLEM). J Affect Disord. 2011 Jun;131(1-3):320-9.