Mobile telephone use among Melbourne drivers: a preventable exposure to injury risk.

Objective: To determine the rate of handheld mobile telephone use among motor vehicle drivers.

Design And Setting: Observational study of motor vehicle drivers at three times (10: 00-11: 00; 14: 00-15: 00; 17: 00-18: 00) on three consecutive Fridays in October 2002 at 12 highway sites in metropolitan Melbourne.

Main Outcome Measures: Rates of mobile phone use overall and by sex and age group, highway site (major metropolitan road, central business district, freeway exit ramp) and time of day (morning, afternoon, evening).

Unethical practices in authorship of scientific papers.

Over the past few decades, there has been an increase in the number of multi-author papers within scientific journals. This increase, in combination with the pressure to publish within academia, has precipitated various unethical authorship practices within biomedical research. These include dilution of authorship responsibility, 'guest', 'pressured' and 'ghost' authorship, and obfuscation of authorship credit within by-lines.