Background Systematic reviews and meta-analyses of observational studies are frequently
performed, but no widely accepted guidance is available at present. We performed a …

Background Mycoplasma genitalium is a common cause of non-gonococcal non-chlamydial
urethritis and cervicitis. Testing of asymptomatic populations has been proposed, but …

Background Intravaginal practices are commonly used by women to manage their vaginal
health and sexual life. These practices could, however, affect intravaginal mucosal integrity …

Background: Clinical trials and meta-analyses have produced conflicting results of the
efficacy of unconjugated pneumococcal polysaccharide vaccine in adults. We sought to …

To evaluate strategies used to select cases and controls and how reported odds ratios are
interpreted, the authors examined 150 case-control studies published in leading general …

Background: Interaction refers to the situation in which the effect of 1 exposure on an
outcome differs across strata of another exposure. We did a survey of epidemiologic studies …

Background Aerosolized vaccine can be used as a needle-free method of immunization
against measles, a disease that remains a major cause of illness and death. Data on the …

This paper explores the relevance of householders' security of tenure to their willingness to
pay the capital and operational costs for sanitation in low-income urban areas. When the …

Simpler schedules for human papillomavirus (HPV) vaccine delivery could improve vaccine
coverage and the effectiveness of cervical cancer prevention. The objective of this study was …

Background Mycoplasma genitalium is increasingly seen as an emerging sexually
transmitted pathogen, and has been likened to Chlamydia trachomatis, but its natural history …