Hypnosis, including self-hypnosis, has tentative evidence. Hypnotherapy is a use of hypnosis in psychotherapy. Hypnotherapy is undertaken while a subject is in a state of hypnosis. In Psychotherapy techniques like hypnosis, meditation, support psychological processes. Relaxation techniques, such as meditation, yoga, hypnosis, and biofeedback, have seen some results with tremors. At this time Robbins taught NLP and Ericksonian Hypnosis. Neuroimaging techniques have been used to investigate neural correlates of hypnosis. Other related concepts are trance, hypnosis, hypomania and mindfulness. Various inhibited states of mind such as drunkenness and hypnosis can increase misinformation effects. CBT combined with hypnosis and distraction reduces self-reported pain in children. Laurence and Perry conducted a study testing the ability to induce memory recall through hypnosis. In intensive care units lorazepam is sometimes used to produce anxiolysis, hypnosis, and amnesia. Tied closely to the concepts of amnesia and hypnosis is the concept of consciousness. Russian medicine has had extensive experience with obstetric hypnosis.