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. Author manuscript; available in PMC: 2013 Nov 29.
Published in final edited form as: J Neurochem. 2004 May;89(4):10.1111/j.1471-4159.2004.02392.x. doi: 10.1111/j.1471-4159.2004.02392.x

Table 1.

Self-administration protocol

Dark cycle (8.31 to 20.30 hours)
Light cycle (20.31 to 8.30 hours)
3-h access self-admin TO 3 h access self-admin TO 3 h access self-admin TO 3 h access self-admin TO 3 h access self-admin TO 3 h access self-admin TO

TO, time-out; self-admin, self-administration.