Inter-System Variability of Eight Different Handheld Ultrasound (HHUS) Devices—A Prospective Comparison of B-Scan Quality and Clinical Significance in Intensive Care oleh Johannes Matthias Weimer, Diana Beer, Christoph Schneider, Masuod Yousefzada, Michael Gottwald, Tim Felix Züllich, Andreas Weimer, Christopher Jonck, Holger Buggenhagen, Roman Kloeckner, Daniel Merkel