Optimizing an adaptive digital oral health intervention for promoting oral self-care behaviors: Micro-randomized trial protocol - Nahum-Shani, Inbal; Greer, Zara M; Trella, Anna L; Zhang, Kelly W; Carpenter, Stephanie M; Ruenger, Dennis; Elashoff, David; Murphy, Susan A; Shetty, Vivek (Contemporary Clinical Trials, 2024)