Mobile Health App and Web Platform (eDOL) for Medical Follow-Up of Patients With Chronic Pain: Cohort Study Involving the French eDOL National Cohort After 1 Year - Noémie Delage; Nathalie Cantagrel; Sandrine Soriot-Thomas; Marie Frost; Rodrigue Deleens; Patrick Ginies; Alain Eschalier; Alice Corteval; Alicia Laveyssière; Jules Phalip; Célian Bertin; Bruno Pereira; et al. (JMIR mHealth and uHealth, 2024)