Reference 12 is incorrect. The correct reference 12 is: "Hill PC, Jackson-Sillah DJ, Fox A, Brookes RH, de Jong BC, et al. (2008) Incidence of tuberculosis and the predictive value of ELISPOT and Mantoux tests in Gambian case contacts. PLoS One 3: e1379".
Footnotes
Competing Interests: No competing interests declared.