Sharing of injection equipment among 3755 intravenous drug users in Valencia, Spain, 1987-1992.
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S. Pérez-Hoyos | I. Hernández-Aguado | J. Belda | M. García de la Hera | M. Aviñó | F. Bolúmar | A. Torrella | C. Santos | I. Ruiz | E. Fernández-García