RT Journal Article SR Electronic(1) A1 van de Berg, Sarah A1 Erkens, Connie A1 Mulder, Christiaan YR 2021 T1 Tuberculosis contact investigation following the stone-in-the-pond principle in the Netherlands – Did adjusted guidelines improve efficiency? JF Eurosurveillance VO 26 IS 45 SP 2001828 OP DO https://doi.org/10.2807/1560-7917.ES.2021.26.45.2001828 UL https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2021.26.45.2001828