Schmidt, W.(2005). Response - Letter to the Editors : Re: Heinicke K, Heinicke I, Schmidt W, Wolfarth B. A Three-Week Traditional Altitude Training Increases Hemoglobin Mass and Red Cell Volume in Elite Biathlon Athletes. Int J Sports Med 2005; 26: 350 - 355: Re: Heinicke K, Heinicke I, Schmidt W, Wolfarth B. A Three-Week Traditional Altitude Training Increases Hemoglobin Mass and Red Cell Volume in Elite Biathlon Athletes. Int J Sports Med 2005; 26: 350 - 355. International Journal of Sports Medicine, 26(6), 506-507. doi:10.1055/s-2005-865833