XXXX : a review of the literature.

@entity1 @entity8668
@entity8668 ( @entity8668 ) has attracted considerable attention in media and professional publications. The aim of this review is to present a critical narrative overview of the published evidence on @entity8668 . A systematic search of key academic databases was undertaken with no time restrictions set for publication. This was supplemented by additional searches of key websites, reference chaining and enquiries to @entity1 working in the field. A total of 54 items are included in the review, including both empirical research studies (18) and debate papers (36). The key themes discussed are: terminology and definitions; incidence; experiences; explanations; implications; and policy responses. Significant methodological limitations and gaps in the literature are identified. Evidence on incidence is scant, though it suggests that @entity8668 is increasing. The literature suggests legal, social and political drivers, which vary in importance geographically and between individuals. Limited findings on @entity1 perceptions suggest a broadly positive @entity1 experience. Suggested policy responses include prohibition, regulatory harmonization and harm minimization. There is a need for better international data collection tools and both quantitative and qualitative work which encompasses views of @entity1 , donors, surrogates and professionals and which explores the implications for healthcare services in sending countries.
