It gives the asymptotic pvalue of the LRT_H test.
1  LRT_H(x, y)

x 
a n x 1 vector of genotypic score for SNP (i.e. 0, 1 or 2, the number of minor alleles of a SNP); n is the number of observations. 
y 
a n x 1 vector of disease status; case/xcontrol: 1/0; ; n is the number of observations. 
Missing values in either x or y (i.e. genotype or disease status) will be removed.
The asymptotic pvalue of LRT_H test.
Zhiyuan (Jason) Xu and Wei Pan
Qian M., Shao Y., 2013. A Likelihood Ratio Test for GenomeWide Association under Genetic Heterogeneity. Annals of Human Genetics, 77(2): 174182.
Zhou H., Pan W., 2009. Binomial Mixture Modelbased Association Tests under Genetic Heterogeneity. Annals of Human Genetics, 73(6): 614630.
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