@article{384095,
      author = {Armitage, P. and Berry, G. and Matthews, J. N. S.},
      url = {http://library.usi.edu/record/384095},
      title = {Statistical methods in medical research [electronic  resource] /},
      publisher = {Blackwell Scientific Publications,},
      recid = {384095},
      pages = {xi, 817 p. :},
      address = {Oxford ;},
      year = {2002},
}