@article{HohmannBeckerFellingeretal.2009,
  author    = {Sarah Hohmann and Katja Becker and Johannes Fellinger and Tobias Banaschewski and Martin H. Schmidt and G{\"u}nter Esser and Manfred Laucht},
  title     = {Evidence for epistasis between the 5-HTTLPR and the dopamine D4 receptor polymorphisms in externalizing behavior among 15-year-olds},
  doi       = {10.1007/s00702-009-0290-1},
  url       = {http://www.springerlink.com/content/101493},
  year      = {2009},
}