title: Changes of sensitivity to pain in relation to postnatal development in rats.
mesh_terms: D000375:Aging; D000818:Animals; D004558:Electric Stimulation; D010146:Pain / Q000503:physiopathology*; D051381:Rats; D012867:Skin / Q000254:growth & development / Q000503:physiopathology; D014828:Vocalization, Animal