(Rodent learning paradigms) can be employed.Logical formLearned from2 sentences. A development of techniques may reduce a severity of some (rodent learning paradigms).Logical formLearned from2 sentences. Rodents can be (animal models).Logical formLearned from2 sentences. A size may pertain-to a rodent.Logical formLearned from2 sentences. A (rodent surgery) can be repetitive.Logical formLearned from2 sentences. Surgical procedures may be performed on rodents.Logical formLearned from2 sentences. Surgery can be in rodents.Logical formLearned from2 sentences. Environment can be for rodents.Logical formLearned from2 sentences. A decrease can be in a number of rodents.Logical formLearned from2 sentences. Densities can be constituted-of-or-filled-with rodents.Logical formLearned from2 sentences. Cages can be for (laboratory rodents).Logical formLearned from2 sentences. (Housing systems) can be for rodents.Logical formLearned from2 sentences. An embryo can be in rodents.Logical formLearned from2 sentences. Rodents can be (model system).Logical formLearned from2 sentences. Rodents can be wounded.Logical formLearned from2 sentences.