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Tu, W; Zhou, X H (1999) A Wald test comparing medical costs based on log-normal distributions with zero valued costs. Stat Med 18:2749-61
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Zhou, X H (1998) Estimation of the log-normal mean. Stat Med 17:2251-64
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Zhou, X H (1998) Comparing correlated areas under the ROC curves of two diagnostic tests in the presence of verification bias. Biometrics 54:453-70
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Zhou, X H; Gao, S (1997) Confidence intervals for the log-normal mean . Stat Med 16:783-90
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Zhou, X H; Gao, S; Hui, S L (1997) Methods for comparing the means of two independent log-normal samples. Biometrics 53:1129-35
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Zhou, X H (1996) Empirical Bayes combination of estimated areas under ROC curves using estimating equations. Med Decis Making 16:24-8
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Zhou, X H (1996) A nonparametric maximum likelihood estimator for the receiver operating characteristic curve area in the presence of verification bias. Biometrics 52:299-305
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Zhou, X H; Gatsonis, C A (1996) A simple method for comparing correlated ROC curves using incomplete data. Stat Med 15:1687-93
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