Patients from the control ( no CPAP ) group had significantly increased concentrations of interleukin ( IL ) -1 , IL-1 , IL-10 , tumour necrosis factor-alpha , macrophage inflammatory protein ( MIP ) -1 , pulmonary and activation-regulated chemokine ( PARC ) , and IL-8 in the collapsed ( right ) lung when compared with patients from the CPAP group ( P < 0.05 ) .