Challenges and Mitigation Strategies in the Development and Feasibility Assessment of a Digital Mental Health Intervention for Depression (VMood): Mixed Methods Feasibility Study - Leena W Chau; Jill K Murphy; Vu Cong Nguyen; Hai Nhu Tran; Harry Minas; Raymond W Lam; Kanna Hayashi; Thi Thanh Xuan Nguyen; Emanuel Krebs; John O'Neil (JMIR Formative Research)