@misc{9381,
  author = {C. Becker and C. Meier and S. Jick and M. Bodmer},
  title = {Case-control analysis on metformin and cancer of the esophagus},
  year = {2013},
  journal = {Cancer Causes Control},
  volume = {24},
  number = {10},
  pages = {1763-70},
  issn = {0957-5243},
  doi = {10.1007/s10552-013-0253-6},
}