WHO has not reviewed the safety, efficacy, quality, applicability, or cost acceptability of any of the technologies referred to hereafter. Therefore, inclusion of the aforesaid fact sheets herein does not constitute a warranty of the fitness of any technology or of any resulting product and any future development thereof, for a particular purpose. Besides, the responsibility for the quality, safety and efficacy of each technology or each resulting product remains with its developer, owner and/or manufacturer. WHO will not be held to endorse nor to recommend any technology or any resulting product thereof, as such or in preference to others.