Asynchronous Distance Learning Performance and Knowledge Retention of the National Institutes of Health Stroke Scale Among Health Care Professionals Using Video or e-Learning: Web-based Randomized Controlled Trial - Avinash Koka; Loric Stuby; Emmanuel Carrera; Ahmed Gabr; Margaret O'Connor; Nathalie Missilier Peruzzo; Olivier Waeterloot; Friedrich Medlin; Fabien Rigolet; Thomas Schmutz; Patrik Michel; Thibaut Desmettre; et al. (Journal of Medical Internet Research)