Inclusion Criteria:  received a diagnosis of GAD in the computerized record system (CMS) in Hong Kong hospital authority score ≥10 on the 7-item Generalized Anxiety Disorder scale (GAD-7), signifying active moderate anxiety symptoms used any website in prior 12 months received stable dose of psychoactive medications in last 2 months  Exclusion Criteria:  any diagnosed psychotic disorder diagnosis of dementia any diagnosed substance abuse disorder (except smoking) active suicidal ideation (score ≥1 on 9-item Patient Health Questionnaire had regular mindfulness meditation practice in last 6 months or had participated in MBSR/MBCT course