Establishment and Maintenance of a Digital Therapeutic Alliance in People Living With Negative Symptoms of Schizophrenia: Two Exploratory Single-Arm Studies - Cassandra Snipes; Cornelia Dorner‑Ciossek; Brendan D Hare; Olya Besedina; Tim Campellone; Mariya Petrova; Shaheen E Lakhan; Abhishek Pratap (JMIR Mental Health)