Hubungan antara short-chain fatty acid dengan ankle pressure, to pressure,ankle-brachial index,peak systolic velocity,volume flow dan gambaran spektral ultrasonografi pada pasien penyakit arteri perifer dengan diabetes melitus = The relationship between short-chain fatty acids with ankle pressure, to pressure, ankle-brachial index, peak systolic velocity, volume flow and ultrasound spectral features in peripheral arterial disease patients with diabetes mellitus