Mental health literacy, folic acid and vitamin B12, and physical activity for the prevention of depression in older adults: randomised controlled trial

J. G Walker, A. J Mackinnon, P Batterham, A. F Jorm, I Hickie, A McCarthy, M Fenech and H. Christensen

The British Journal of Psychiatry 197 ( 1 ): 45 - 54 , 2010