AUTHOR=Wang Xuefeng TITLE=Firth logistic regression for rare variant association tests JOURNAL=Frontiers in Genetics VOLUME=5 YEAR=2014 URL=https://www.frontiersin.org/journals/genetics/articles/10.3389/fgene.2014.00187 DOI=10.3389/fgene.2014.00187 ISSN=1664-8021