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. Author manuscript; available in PMC: 2020 Oct 21.
Published in final edited form as: Behav Brain Res. 2020 Jul 31;394:112841. doi: 10.1016/j.bbr.2020.112841

Fig. 1.

Fig. 1.

Number of publications on ketamine indexed in PubMed each year from 1965 to 2019, based on a simple keyword search. Note the upward incline beginning in the late 1990s, and then escalating in the past decade, illustrating the tremendous growth in research on the compound.