text: The most potent<unk> <unk> in the development of<unk> 's<unk>  is tobacco smoking. Other<unk><unk>  include male sex, rickettsial infection, South Asian or Middle Eastern descent, age between 20 - 45 years and a medical history of Raynaud's<unk>  or autoimmune<unk> .
option_0: Buerger's disease risk factors
option_1: Takayasu's arteritis risk factors
option_2: Buerger's disease other diagnostic studies
option_3: Polyarteritis nodosa risk factors
option_4: Buerger's disease other imaging findings
option_5: Uveitis risk factors
option_6: Buerger's disease causes
option_7: Microscopic polyangiitis risk factors