EANM position paper on article 56 of the Council Directive 2013/59/Euratom (basic safety standards) for nuclear medicine therapy. - Konijnenberg, Mark; Herrmann, Ken; Kobe, Carsten; Verburg, Frederik; Hindorf, Cecilia; Hustinx, Roland; Lassmann, Michael (European Journal of Nuclear Medicine & Molecular Imaging, 2021)