The systems analysis based on a review of systematic reviews of HIV risk among gay and bisexual men who have sex with men (GBMSM) by Stojanovski et al is very welcome indeed.
The strength of this paper also means that it is useful to discuss some of its limitations, many of which the authors recognise, since these suggest ways that systems theory approaches based on the socioecological model may need to be extended or corrected to meet the needs of the field. As the authors recognise, any review of reviews is limited by the limits of both the reviews they review and the papers reviewed by these reviews. This means that the theoretical, geographical and temporal limitations of prior…