3Pincus HA, Pettit AR. The societal costs of chronic major depression [J]. J Clin Psychiatry, 2001, 62: 5-9.
4Mischoulon D, Fava M. Role of S-adenosyl-L-methionine in the treatment of depression: a review of the evidence [J]. Am J Clin Nutr, 2002, 76: 1158-1161.
5Alpert JE, Mischoulon D, Nierenberg AA, et al. Nutrition and depression: focus on folate [J]. Nutrition, 2000, 16: 544-546.