Safety and efficacy of an equimolar mixture of oxygen and nitrous oxide: a randomized controlled trial in patients with peripheral neuropathic pain.

Bouhassira D, Perrot S, Riant T, Martiné-Fabre G, Pickering G, Maindet C, Attal N, Ranque Garnier S, Nguyen JP, Kuhn E, Viel E, Kieffert P, Tölle T, Delorme C, Deleens R, Giniès P, Corand-Dousset V, Dal-Col C, Serrie A, Chevrillon E, Gov C, Ramirez-Gil JF, Delval C, Schaller M, Bessière B, Houéto P, Sommer C; ProtoTOP group.