Multispecialty comparison of point-of-care-ultrasound use, training, and barriers: a national survey of VA medical centers. - Resop DM; Bales B; Theophanous RG; Koehler J; Boyd JS; Mader MJ; Williams JP; Nathanson R; Basrai Z; Haro EK; Khosla R; Wetherbee E; et al. (The ultrasound journal, 2025)