@article{SeidlerBolmAudorffAbolmaalietal.2008,
  author    = {Andreas Seidler and Ulrich Bolm-Audorff and Nasreddin Abolmaali and Gine Elsner},
  title     = {The role of cumulative physical work load in symptomatic knee osteoarthritis : a case-control study in Germany},
  journal   = {Journal of occupational medicine and toxicology},
  volume    = {3},
  number    = {14},
  doi       = {10.1186/1745-6673-3-14},
  year      = {2008},
}