Sociodemographic Characteristics Associated With an eHealth System Designed to Reduce Depressive Symptoms Among Patients With Breast or Prostate Cancer: Prospective Study - Nuhamin Gebrewold Petros; Gergo Hadlaczky; Sara Carletto; Sergio Gonzalez Martinez; Luca Ostacoli; Manuel Ottaviano; Björn Meyer; Enzo Pasquale Scilingo; Vladimir Carli (JMIR Formative Research, 2022)