GBD 2015, the next update of GBD, will be fully aligned with the suggestions outlined in the Guidelines for Accurate and Transparent Health Estimates Reporting (GATHER) Statement. GATHER defines best practices for documenting studies that synthesize evidence from multiple sources to quantitatively describe past and current population health and its determinants. These practices include documenting and sharing data inputs, analyses and methods, and results. Documenting the input data on which estimates are based, and the methods by which estimates are derived, is essential for the accurate interpretation and use of results. For more information, visit the GATHER website.