1.   Back at the clinic, Batma said exchanging needles is not enough.

2.   But exchanging clean needles for used ones is more effective, it said, because as time passes fewer drug users follow the proper disinfection procedures.

3.   Critics contend that exchanging dirty needles for clean ones only makes it easier for addicts to continue using drugs and for people to try drugs for the first time.

4.   In Temirtau, money from the United Nations and the steel company equipped the modest center in a former kindergarten where users exchange needles and receive some medication.

5.   She used to exchange needles, but now said she was trying to quit drugs.

6.   The cards are needed to exchange needles and establish that the participants possess them legally.

7.   There was a mother who regularly exchanges needles for her teen-age children.

8.   Watters strongly advocated programs that allowed drug users to exchange used needles for clean ones.

9.   The city has nine centers where used needles can be exchanged for new, no questions asked.