Maybe someone can take a second look at the paper. I couldn't find the published version, just a manuscript[1] (kudos to the authors for making it available under CC license). But... The only reference I could find about the sample size says:

> "To prepare a single RNA injection, the pleural-pedal and abdominal ganglia were removed from 4-5 sensitization-trained animals—or from 4-5 untrained controls—immediately after the 48-h posttest"

4-5??? I really hope that I'm missing something here, otherwise I find truly depressing how low the bar is for scientific journals.

[1] http://www.eneuro.org/content/eneuro/early/2018/05/14/ENEURO...