Chemical composition of cigarettes could be a confounding factor.
Prabhu
Sanjay P
SP
D000800:Angioplasty, Balloon; D001157:Arterial Occlusive Diseases / Q000000981:diagnostic imaging / Q000628:therapy*; D015986:Confounding Factors, Epidemiologic; D005263:Femoral Artery; D006801:Humans; D007083:Iliac Artery; D007511:Ischemia / Q000000981:diagnostic imaging / Q000628:therapy; D007866:Leg / Q000098:blood supply*; D011150:Popliteal Artery; D012008:Recurrence; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects*; D018615:Ultrasonography, Doppler, Color