Loneliness and Major Depressive Disorder in the Elderly with a History of Suicidal Ideation or Attempt: A Comment on "Therapist-Guided Internet-Based Treatments for Loneliness" by Käll et al. - Siu HC; Lee SH; Au JS; Lo AP; Huang CM; Tsai YF; Lee TM; Liu HL; Lin C; Chiu CD (Psychotherapy and psychosomatics, 2022)