Galbraith, N S Interpretation of positive reactions to Heaf tuberculin test in London schoolchildren. [electronic resource] - British medical journal Mar 1972 - 647-9 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0007-1447 Standard No.: 10.1136/bmj.1.5801.647 doi Subjects--Topical Terms: AdolescentBCG VaccineChildDiagnosis, DifferentialFalse Positive ReactionsHumansLondonMass ScreeningMethodsMycobacterium Infections--diagnosisMycobacterium tuberculosis--immunologyTuberculin--pharmacologyTuberculin Test