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There is strong evidence for seasonal patterns, other calendar month effects, and workday effects. Examination of subgroups defined by reporting delay, initial diagnosis, risk group, and region shows evidence for seasonal patterns in some diagnosis groups, for effects due to imputed diagnosis dates, and for effects due to patients' choices of when to seek diagnosis.<\/jats:p>","DOI":"10.1002\/sim.4780131905","type":"journal-article","created":{"date-parts":[[2007,4,28]],"date-time":"2007-04-28T13:18:08Z","timestamp":1177766288000},"page":"1921-1931","source":"Crossref","is-referenced-by-count":11,"title":["Seasonal and other short\u2010term influences on United States AIDS incidence"],"prefix":"10.1002","volume":"13","author":[{"given":"Peter","family":"Bacchetti","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2006,10,15]]},"reference":[{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.2994217"},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.2307\/2982184"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.1080\/01621459.1988.10478599"},{"key":"e_1_2_1_5_2","doi-asserted-by":"crossref","first-page":"276","DOI":"10.1093\/oxfordjournals.aje.a115872","article-title":"Backcalculation of the number with HIV infection in the United States","volume":"133","author":"Rosenberg P. 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