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. 2006 Jun 12;114(9):1387–1393. doi: 10.1289/ehp.9234

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PLS analysis based on chemical classes. (A) Loading plot showing relationships among predictors (chemical class) and responses (toxicity end points) based on a two-component model. Observed versus predicted responses for (B) total cells and (C) lavage LDH. Abbreviations: S, summer; W, winter.