Effects of mindfulness on psychological health: A review of empirical studies☆Shian-Ling Keng a,⁎, Moria J. Smoski b, Clive J. Robins a,ba Department of Psychology and Neuroscience, Duke University, Durham, NC 27708, United Statesb Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC 27710, United States