Correction to: The effect of initial teaching on evaluation of left ventricular volumes by cardiovascular magnetic resonance imaging: comparison between complete and intermediate beginners and experienced observers. - Erik Hedström; Masaki Ishida; Álvaro Sepúlveda-Martínez; Daniel Ryd; Johannes Sperling; Henrik Engblom; Eike Nagel (BMC Medical Imaging, 2022)