即兴表演在路上——爵士乐与凯鲁亚克的《在路上》
Published in 乐山师范学院学报 • Jan 1, 2008
Authors:
袁羽
Abstract
One of the characteristics on cohort studies is that exposures may change over time. The full use of information related to time-updated exposures, time-dependent covariates and their relationships to estimate the association between exposures and outcomes has become the hotspot of research. In this...
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