@article{pike_morrow_1970, 
  title={Statistical analysis of patient-control studies in epidemiology. Factor under investigation an all-or-none variable.}, 
  volume={24}, 
  DOI={10.1136/jech.24.1.42}, 
  publisher={BMJ}, 
  author={Pike and Morrow}, 
  year={1970}, 
  month={Feb}
  }