@article{Vonbach_Reich_Möll_Meier_2007, title={Risk factors for gastrointestinal bleeding: a hospital-based case-control study}, volume={137}, url={https://smw.ch/index.php/smw/article/view/803}, DOI={10.4414/smw.2007.11912}, number={4950}, journal={Swiss Medical Weekly}, author={Vonbach, P and Reich, R and Möll, F and Meier, CR}, year={2007}, month={Dec.}, pages={705–710} }