PDE5	Phosphodiesterase 5
TNF-α	Tumour necrosis factor alpha
IL-6	Interleukin 6
IL-8	Interleukin 8
IL-10	Interleukin 10
NO	Nitric oxide
cGMP	Cyclic guanosine monophosphate
VCAM	Vascular cell adhesion molecule
ICAM	Intracellular adhesion molecule
CRP	C-reactive protein
ST	Short term
IT	Intermediate term
LT	Long term
CI	Confidence interval
SMD	Standardised mean differences
SD	Standard deviation