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Volunteer bias in nonrandomized evaluations of the efficacy of needle-exchange programs

✍ Scribed by Holly Hagan; James P. McGough; Hanne Thiede; Sharon G. Hopkins; Noel S. Weiss; E. Russell Alexander


Publisher
Springer US
Year
2000
Tongue
English
Weight
478 KB
Volume
77
Category
Article
ISSN
1099-3460

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