Comparison of Two Symptom Checkers (Ada and Symptoma) in the Emergency Department: Randomized, Crossover, Head-to-Head, Double-Blinded Study by Johannes Knitza, Ragip Hasanaj, Jonathan Beyer, Franziska Ganzer, Anna Slagman, Myrto Bolanaki, Hendrik Napierala, Malte L Schmieding, Nizam Al-Zaher, Till Orlemann, Felix Muehlensiepen, Julia Greenfield, Nicolas Vuillerme, Sebastian Kuhn, Georg Schett, Stephan Achenbach, Katharina Dechant

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