He challenged Galen's work on several fronts, including the treatment of bloodletting.

He added that the city may challenge some of the Justice Department regulations in court, including a $185 application fee for aliens who seek amnesty.

It challenged Aristotle's position on the independence of politics from other social life, including economic activities.

In many countries there are attempts to challenge perceived prejudice against minority groups, including alleged institutional racism within psychiatric services.

But he also challenged popular Democratic positions on a number of politically sensitive issues, including Social Security and foreign trade.

He challenged seven other swimmers on the same heat as Sydney, including his former rival Razakarivony.

He challenged seven other swimmers on the seventh heat, including top medal favorite Michael Phelps.

Such astep would challenge all other governments in the world, including those of the four Scandinavian countries, to live up to their rhetoric of equality.

The Ford results challenged some other recent conclusions about the market, including the belief that demand for subcompact cars is dropping.

They challenged some of its rules, including those that governed the placing of campaign signs on property and access to the association's financial records.