@article{ScheelMattesonDasguptaetal.2009,
  author    = {Alexander Konrad Scheel and Eric L. Matteson and Bhaskar Dasgupta and George A. W. Bruyn and Sarah Ohrndorf and Carola Werner and Wolfgang Andreas Schmidt},
  title     = {Reliability exercise for the polymyalgia rheumatica classification criteria study : the Oranjewoud ultrasound substudy},
  journal   = {International journal of rheumatology},
  volume    = {2009},
  number    = {Art. 738931},
  pages     = {1 -- 5},
  doi       = {10.1155/2009/738931},
  year      = {2009},
}