title: Response to letter to the editor: regarding "individual and neighborhood correlates of membership in drug-using networks with a higher prevalence of human immunodeficiency virus (2006-2009)".
authors: Pacific Institute for Research and Evaluation, 11720 Beltsville Drive, Suite 900, Calverton, MD 20705. Electronic address: arudolph@PIRE.org.
authors: Abby E
authors: AE
authors: Rudolph
authors: Natalie D
authors: ND
authors: Crawford
authors: Crystal M
authors: CM
authors: Fuller
mesh_terms: D005260:Female; D015658:HIV Infections / Q000453:epidemiology*; D006801:Humans; D008297:Male; D012111:Residence Characteristics; D060756:Social Networking; D015819:Substance Abuse, Intravenous / Q000453:epidemiology*
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