@misc{10412,
  author = {Perez Gutthann and L. Rodriguez and J. Castellsague and Duque Oliart},
  title = {Hormone replacement therapy and risk of venous thromboembolism: population based case-control study},
  year = {1997},
  journal = {Bmj},
  volume = {314},
  number = {7083},
  pages = {796-800},
  issn = {0959-8138 (Print) 0959-8138},
}