Effects of two types of smartphone-based stress management programmes on depressive and anxiety symptoms among hospital nurses in Vietnam: a protocol for three-arm randomised controlled trial

Kotaro Imamura, Thi Thu Tran Thuy, Thanh Nguyen Huong, Kazuto Kuribayashi, Asuka Sakuraya, Quoc Nguyen Anh, Minh Bui Thu, Thuy Nguyen Quynh, Trung Nguyen Kien, Thi Huong Nguyen Giang, Thi Ngoc Tran Xuyen, Quang Truong Tien, Melvyn WB Zhang, Harry Minas, Yuki Sekiya, Natsu Sasaki, Akizumi Tsutsumi, Norito Kawakami