Background Studies have shown wide variation in the prevalence of lactose malabsorption across the world, but no systematic reviews or meta-analyses have recently assessed the prevalence of lactose

Background So far, a comprehensive systematic review and meta-analysis has not been done of the prevalence of primary antibiotic resistance in Helicobacter pylori in the Asia-Pacific region.

The World Professional Association for Transgender Health's standards of care recommend suspending puberty, preferably with the use of gonadotropin-releasing hormone agonists, in certain gender non

Background The relation between dietary nutrients and cardiovascular disease risk markers in many regions worldwide is unknown.

Background Although abortion is legal in Thailand for a number of indications, women from Burma residing in Thailand are rarely able to access safe services.

Megacities contain at least 10 million people whose wellbeing largely depends on ecosystem services provided by remote natural areas.

Background The ambitious development agenda of the Sustainable Development Goals (SDGs) requires substantial investments across several sectors, including for SDG 3 (healthy lives and wellbeing).

Background Urban transport related exposures and practices are associated with a significant burden of morbidity and premature mortality, which could be prevented by changing current practices.

Background Data for on-demand pre-exposure prophylaxis (PrEP) are scarce. We implemented a cohort study to assess its efficacy, safety, and effect on sexual behaviour.

Background Since 2002, Afghanistan has made much effort to achieve universal health coverage.