Virtual Digital Psychotherapist App–Based Treatment in Patients With Methamphetamine Use Disorder (Echo-APP): Single-Arm Pilot Feasibility and Efficacy Study

Tianzhen Chen   ^{1 *} , MD, PhD ;   Liyu Chen   ^{1 *} , MPsy ;   Shuo Li   ¹ , MPsy ;   Jiang Du   ¹ , MD, PhD ;   Hang Su   ¹ , MD, PhD ;   Haifeng Jiang   ¹ , MD, PhD ;   Qianying Wu   ¹ , MPsy ;   Lei Zhang   ¹ , MPsy ;   Jiayi Bao   ¹ , MPsy ;   Min Zhao   ^{1, 2, 3} , MD, PhD

¹ Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China

² Shanghai Key Laboratory of Psychotic Disorders, Shanghai, China

³ Center for Excellence in Brain Science and Intelligence Technology (CEBSIT), Chinese Academy of Sciences, Shanghai, China

*these authors contributed equally