Introduction PRISMA statement was published in 2009 in order to set standards in the
reporting of systematic reviews and meta-analyses. Our aim was to evaluate the impact of …

Background No systematic attempts have been made to estimate the global and regional
prevalence of amphetamine, cannabis, cocaine, and opioid dependence, and quantify their …

En este trabajo se elabora un marco conceptual y se desarrollan unos principios básicos
para fundamentar un sistema de clasificación de los diseños de investigación más usuales …

The Global Burden of Disease (GBD) 2010 Study produced comparable estimates of the
burden of 291 diseases and injuries in 1990, 2005, and 2010. This article reports on the …

Background Economic evaluations of health interventions pose a particular challenge for
reporting because substantial information must be conveyed to allow scrutiny of study …

OBJECTIVE: To develop evidence-based clinical practice guidelines for interventional
techniques in the diagnosis and treatment of chronic spinal pain. METHODOLOGY …

The rising incidence of Clostridium difficile infection (CDI) could be reduced by lowering
exposure to high-risk antibiotics. The objective of this study was to determine the association …

OBJECTIVE: To systematically review cohort studies of mortality among people who inject
drugs, examine mortality rates and causes of death in this group, and identify participant-and …

BACKGROUND: Stereoelectroencephalography (SEEG) methodology, originally developed
by Talairach and Bancaud, is progressively gaining popularity for the presurgical invasive …

BACKGROUND: The use of normal saline is associated with hyperchloremic metabolic
acidosis. In this study, we sought to determine the incidence of acute postoperative …