What’s Going On With Me and How Can I Better Manage My Health? The Potential of GPT-4 to Transform Discharge Letters Into Patient-Centered Letters to Enhance Patient Safety: Prospective, Exploratory Study - Felix Eisinger; Friederike Holderried; Moritz Mahling; Christian Stegemann–Philipps; Anne Herrmann–Werner; Eric Nazarenus; Alessandra Sonanini; Martina Guthoff; Carsten Eickhoff; Martin Holderried (Journal of Medical Internet Research)