curprev20:1520:15, 26 March 2020 WaimiriMainatalkcontribs 22,197 bytes+334 I changed type of retrograde neurotransmitter from cannabinoid to endocannabinoid while maintaining the link. This is because endocannabinoids are the ones involved in retrograde neurotransmission. I also included a link to a citation for the sectionundoTag: Visual edit