Arnold DT, Bhatnagar R, Fairbanks LD, Zahan-Evans N, Clive AO, Morley AJ, Medford ARL, Maskell NA. Pleural Fluid Adenosine Deaminase (Pfada) in the Diagnosis of Tuberculous Effusions in a Low Incidence Population. PLoS ONE. 2015 Feb 03;10(2):e0113047. doi: 10.1371/journal.pone.0113047.