Lei Zhang

TL;DR: In this paper, the authors used data for exposure to risk factors by country, age group, and sex from pooled analyses of population-based health surveys and obtained relative risks for the eff ects of risk factors on cause-specifi c mortality from meta-analyses of large prospective studies.

TL;DR: In this article, the irreversible ErbB family blocker, afatinib, significantly improved progression-free survival (PFS), time-to-treatment failure (TTF) and objective response rate (ORR) versus gefitinib in patients with epidermal growth factor receptor (EGFR) mutation-positive non-small-cell lung cancer.

TL;DR: The proposed phase-change metamaterial provides a simple way to realize a broadband perfect absorber in the visible and near-infrared (NIR) regions and is important for a number of applications including thermally controlled photonic devices, solar energy conversion and optical data storage.

TL;DR: HIV epidemics among injecting drug users are decreasing in all regions outside southwest China and have stabilised at a high level in northwest China, and strong associations between HIV prevalence among at-risk populations in each province are recorded, supporting the existence of overlap in risk behaviours and mixing among these populations.

TL;DR: Estimates suggest that earlier eligibility for antiretroviral therapy is very cost effective in low-income and middle-income settings, although these estimates should be revisited when more data become available.