1.   As crack use has stabilized, many crack smokers have also turned to heroin to ease their cocaine jitters.

2.   Clusters of cases were associated with crack cocaine use, where users huddled in airtight houses, coughing.

3.   Crack use has greatly diminished in New York and, with it, crime.

4.   Crack use, in particular, has made their symptoms worse.

5.   Crack use recently has been identified as a risk factor for HIV infection in women, because women will sell sex to buy drugs.

6.   In recommending this change, Reno and McCaffrey noted that crack use has stabilized and that crack-associated violence has decreased.

7.   Several city child-welfare and law-enforcement officials said they believed that the reduction in crack use had contributed to the decline in child-abuse deaths.

8.   Some experts also say that a decline in crack use and an increase in heroin use may be another explanation.

9.   The reasons are unknown, but researchers suspect that the prevalance of crack cocaine use in the East, often accompanied by unprotected sex, may be to blame.

10.   Toxicology reports showed that four of the five victims tested positive for crack cocaine use prior to death.