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. Author manuscript; available in PMC: 2013 Aug 15.
Published in final edited form as: Biol Psychiatry. 2012 Apr 18;72(4):331–338. doi: 10.1016/j.biopsych.2012.03.004

Figure 4.

Figure 4

Hydroxynorketamine (HNK) 4a plasma concentrations by response and diagnosis in patients with treatment-resistant depression. Hydroxynorketamine 4a plasma concentrations were significantly higher in patients with bipolar depression (BD) than in patients with major depressive disorder (MDD).