If you make use of VCFtools in your research, the authors would
appreciate a citation of the following paper:

The Variant Call Format and VCFtools, 
Petr Danecek, Adam Auton, Goncalo Abecasis, Cornelis A. Albers, 
Eric Banks, Mark A. DePristo, Robert Handsaker, Gerton Lunter, 
Gabor Marth, Stephen T. Sherry, Gilean McVean, Richard Durbin 
and 1000 Genomes Project Analysis Group, Bioinformatics, 2011
    
http://dx.doi.org/10.1093/bioinformatics/btr330
