title: Psychological and physiological effects of relaxation and nitrous oxide training.
mesh_terms: D003131:Combined Modality Therapy; D006801:Humans; D009609:Nitrous Oxide / Q000627:therapeutic use*; D012064:Relaxation Therapy; D013315:Stress, Psychological / Q000628:therapy*; D014743:Videotape Recording
chemical_list: D009609:Nitrous Oxide