Granulocyte-Macrophage Stimulating Factor (GM-CSF) in Peripheral Arterial Disease

Participants will self-administer 500 μg/day of GM-CSF, subcutaneously, three times per week (Monday, Wednesday, Friday) for three weeks. After three months the participants will receive a second administration of 500 μg/day of subcutaneous GM-CSF, three times per week for another 3 weeks and then will be followed for another 3 months.

Participants will self-administer 500 μg/day of a placebo, subcutaneously, three times per week (Monday, Wednesday, Friday) for three weeks. After three months the participants will receive a second administration of 500 μg/day of a placebo administered subcutaneously, three times per week for another 3 weeks and then will be followed for another 3 months.