3501320 SVAS supravalvular aortic stenosis 196 3501319 SVAS subnormal visual acuity syndromes 5 3501321 SVAS skeletal variant assay system 4 3501327 SVAS symptomatic vertebrobasilar artery stenosis 3 3501318 SVAS Short Video Addiction Scale 2 3501326 SVAS subnormal visual acuity 2 3501325 SVAS segmented visual analogue scales 1 3501324 SVAS self-evaluation on a visual analogic scale 1 3501323 SVAS Short Video Addiction Scale for College Students 1 3501322 SVAS Short video addiction symptoms 1