3. Raynaud's Phenomenon secondary to non-connective tissue disorders including thromboangiitis obliterans (Buerger's disease), hemorheologic disorders, major arterial occlusive disease, past exposure to vasopathic agents (including vinblastine, cis platinum, and bleomycin), ongoing therapy with vasoconstrictive agents (eg, beta-blockers), and past frostbite injury amongst others. Subjects with hepatitis C should also be excluded.