AUTHOR=Xu Qing , Ma Jennie Z., Payne Thomas J., Li Ming D. TITLE=Determination of methylated CpG sites in the promoter region of catechol-O-methyltransferase (COMT) and their involvement in the etiology of tobacco smoking JOURNAL=Frontiers in Psychiatry VOLUME=1 YEAR=2010 URL=https://www.frontiersin.org/journals/psychiatry/articles/10.3389/fpsyt.2010.00016 DOI=10.3389/fpsyt.2010.00016 ISSN=1664-0640