11.   Washington state, Oregon and California have the highest incidence of heroin abuse in the West.

12.   He said many health problems involving heroin abuse stem from dirty needles rather than the drug itself.

13.   Heroin abuse was generally low, accounting for less than two percent of treatment admissions in the three cities.

14.   Heroin abuse has been spreading to the young, including college and high school students, in recent years.

15.   Opium use is diminishing in several southeast Asian countries, but heroin abuse is increasing.

16.   The increasing transit traffic of heroin there could have the spillover effect of increasing heroin abuse as well in the region.