Four people were excluded; in 3 nebulised pentamidine prophylaxis was administered for non-HIV associated reasons (2 post renal transplant, during chemotherapy for a neuroendocrine tumour in 1: all 3 had undetectable viral loads and CD4 counts >200 cells/ μ L): one further patient had HIV-2. Here, CD4 is linked to neuroendocrine neoplasm.