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Citation: Yo. Schumacher et al., Artificial oxygen carriers - The new doping threat in endurance sport?, INT J SP M, 22(8), 2001, pp. 566-571

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Citation: Yo. Schumacher et al., Development of peak performance in track cycling, J SPORT MED, 41(2), 2001, pp. 139-146

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Citation: Yo. Schumacher et al., Haemoglobin, haematocrit and red blood cell indices in elite cyclists. Arethe control values for blood testing valid?, INT J SP M, 21(5), 2000, pp. 380-385

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Citation: M. Huonker et al., Cardiac function and haemodynamics in alcoholic cirrhosis and effects of the transjugular intrahepatic portosystemic stent shunt, GUT, 44(5), 1999, pp. 743-748