%0 Guideline %T [Changes in the KTW (contact with drinking water) guideline (previously testing guideline)]. %J Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz %V 50 %N 9 %D Sep 2007 %M 17828479 %F 1.595 %R 10.1007/s00103-007-0318-3 %X