Are titanium implants superior to gold implants in the tympanic cavity?
The functional results of both materials are comparable. Due to the high extruding rates of gold prostheses titanium is clearly superior.
The patchwork of US workplace smoking restriction policy at different governmental levels, combined with a voluntary regime among some employers, generates coverage inequalities. Workplace smoke-free policies may be less effective for immigrants, and this is related to differential coverage by such policies due to occupational segregation. Understanding the complex patterns of the social context of smoking is important for understanding how policy interventions might have heterogeneous effects for different demographic groups.