AUTHOR=Urbanski Henryk F. TITLE=Introduction to special topic—estrogenic control of hypothalamic GnRH neurons JOURNAL=Frontiers in Endocrinology VOLUME=3 YEAR=2012 URL=https://www.frontiersin.org/journals/endocrinology/articles/10.3389/fendo.2012.00137 DOI=10.3389/fendo.2012.00137 ISSN=1664-2392