Figure 2.

Ketamine plasma levels. Ketamine plasma levels were in accordance with those previously described in the literature (Zarate et al., 2012). PET measurement began 5 minutes after completion of the ketamine infusion (0.50 mg/kg bodyweight over 40 min) and ketamine plasma levels were drawn 5, 10, 20, 30, 40, 60, and 80 minutes after the start of PET. The 5-minute ketamine value from 1 subject was removed from analyses due to probable blood draw error. For ketamine plasma levels see Table 2.