sentences:  Stein is enthusiastic about the possibility of clinical practice and scientific research that integrates theoretical concepts and empirical data across these different levels.Having worked for many years in South Africa, he is also enthusiastic about establishing integrative approaches to services, training, and research in the context of a low and-middle-income country.Stein chaired the DSM-5 and the ICD-11 workgroups on obsessive-compulsive and related disorders.