@article{HeilingKnuttiScherretal.2021,
  author    = {Sven Heiling and Nadine Knutti and Franziska Scherr and J{\"o}rg Geiger and Juliane Weikert and Michael Rose and Roland Jahns and Uta Ceglarek and Andr{\´e} Scherag and Michael Kiehntopf},
  title     = {Metabolite ratios as quality indicators for pre-analytical variation in serum and EDTA plasma},
  journal   = {Metabolites},
  volume    = {11},
  number    = {9},
  doi       = {10.3390/metabo11090638},
  year      = {2021},
}