Co-occurring mental health problems in adolescents with ADHD and sleep problems.

Objective: Sleep problems are highly prevalent and impairing in adolescents with ADHD. However, their relation with co-occurring mental health problems is still unclear. This study assessed whether adolescents with ADHD, with and without self-reported sleep problems, differ from each other in co-occurring mental health problems, and whether they differ from adolescents without ADHD.

Zirconia ageing is related to total hip arthroplasty aseptic loosening. A study of 45 retrieved zirconia heads.

Background: Y-TZP zirconia heads were recalled by the Food and Drug Administration (FDA) in 2001 and zirconia alone was no longer used in orthopedics. Tunnel furnace sintering was suspected of producing defects responsible for early material failure. As Zirconia Toughened Alumina (ZTA) matrices are widely used as bearing material and contain zirconia grains, there remains a need to better understand the in vivo ageing process of zirconia and its clinical implications when the material is produced by batch furnace sintering, the validated sintering process.

Advancing the future of equitable access to health care: recommendations from international health care leaders.

Disparities in access to health care are persistent and contribute to poor health outcomes for many populations around the world. Barriers to access are often similar across countries, despite differences in how health systems are structured. Health care leaders can work to address these barriers through bold, evidence-based actions.