?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=McGovern&rft.au=McGovern%2C+ME&rft.aufirst=ME&rft.issue=2&rft.pages=229-237&rft.issn=1531-5487&rft.title=Epidemiology&rft.atitle=On+the+assumption+of+bivariate+normality+in+selection+models%3A+a+Copula+approach+applied+to+estimating+HIV+prevalence.&rft.volume=26&rft.date=March+2015&rft.genre=article