Actigraphy-based detection of isolated REM sleep behavior disorder: multicenter validation across devices and populations. - Li Zhou; Andreas Brink-Kjaer; Katarina Mary Gunter; Salonee Marwaha; Ambra Stefani; Birgit Högl; Michele T. Hu; Emmanuel Mignot; Ankit Parekh; Qi Tang; Merve Aktan-Süzgün; Bei Huang; et al. (npj Digit. Medicine, 2025)