As the estimated cumulative risk among lifelong nonsmokers in the UK is probably about 0.2% too low, the sum of the cumulative risks for the other two categories is probably about 0.2% too high
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The data in the study include only those smokers who volunteered for clinical trials and attended smoking-cessation clinics, a self-selecting minority of smokers who may differ in important respects from those who quit without professional assistance, the authors write
[29] [46] It is most often caused by Histoplasma capsulatum , Blastomyces , Cryptococcus neoformans , Pneumocystis jiroveci (pneumocystis pneumonia, or PCP), and Coccidioides immitis
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