Promoting rational antibiotic therapy among high antibiotic prescribers in German primary care-study protocol of the ElektRA 4-arm cluster-randomized controlled trial. - Löffler, Christin; Buuck, Theresa; Iwen, Julia; Schulz, Maike; Zapf, Antonia; Kropp, Peter; Wollny, Anja; Krause, Linda; Müller, Britta; Ozga, Ann-Katrin; Goldschmidt, Elisabeth; Altiner, Attila (Implementation Science, 2022)