Then 40 potentially relevant studies were examined for full-texts, and 27 full-text articles were excluded for the following reasons: 8 were PCT levels in non-malaria, 6 were reviews, 6 were case reports, 3 had incomplete data/unable to extract, 2 had unavailable full-texts, 1 studied PCT in malaria and bacteremia co-infection, and 1 study used the same group of participants. The gene discussed is CALCA; the disease is malaria.