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There was no distance decay effect on traveling time, but an association between distance and transport selection could be demonstrated. The residence locations displayed a compact distribution, merging with the general population without any evidence of clustering. Though the distribution of methadone users could have been shaped by the location of clinic, it can also be concluded that methadone clinics at convenient locations are needed if maintenance is a key determinant of service effectiveness.<\/jats:p>","DOI":"10.1186\/1477-7517-7-14","type":"journal-article","created":{"date-parts":[[2010,7,22]],"date-time":"2010-07-22T14:17:20Z","timestamp":1279808240000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["Assessing the spatial distribution of methadone clinic clients and their access to treatment"],"prefix":"10.1186","volume":"7","author":[{"given":"Ngai Sze","family":"Wong","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shui Shan","family":"Lee","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hui","family":"Lin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2010,7,5]]},"reference":[{"issue":"2","key":"182_CR1","doi-asserted-by":"publisher","first-page":"129","DOI":"10.1016\/0376-8716(94)90095-7","volume":"36","author":"CG Schutz","year":"1994","unstructured":"Schutz CG, Rapiti E, Vlahov D, Anthony JC: Suspected determinants of enrollment into detoxification and methadone maintenance treatment among injecting drug users. 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