Adult 1 Direct current stimulation 1 Female 1 Humans 1 Male 1 Memory, Long-Term 1 Mental Recall 1 Practice (Psychology) 1 Prefrontal Cortex 1 Retrieval practice 1 Testing effect 1 Transcranial Direct Current Stimulation 1 Verbal episodic memory adult 1 article 1 controlled study 1 dorsolateral prefrontal cortex 1 episodic memory 1 female 1 human 1 human experiment 1 information retrieval 1 learning 1 long term memory 1 major clinical study 1 male 1 memory 1 physiology 1 prefrontal cortex 1 randomized controlled trial 1