@article{  
   author = {A. McLysaght, P. Baldi, B. S. Gaut},
   title = {Extensive Gene Gain Associated With Adaptive Evolution of Poxviruses.},
   journal = {Proceedings of the National Academy of Sciences USA},
   volume = {100},
   number = {26},
   pages = {15655-15660},
   note = {},
   abstract = {},
   keywords = {},
   year = {2003}
}