mHealth Messaging to Motivate Quitline Use and Quitting: Protocol for a Community-Based Randomized Controlled Trial in Rural Vietnam oleh Celine Larkin, Jessica Wijesundara, Hoa L Nguyen, Duc Anh Ha, Anh Vuong, Cuong Kieu Nguyen, Daniel Amante, Chau Quy Ngo, Phuong Thu Phan, Quyen Thi Le Pham, Binh Ngoc Nguyen, Anh Thi Phuong Nguyen, Phuong Thi Thu Nguyen, Sharina Person, Jeroan J Allison, Thomas K Houston, Rajani Sadasivam