sentences:  HSR is more concerned with delivery and high quality access to care, in contrast to medical research, which focuses on the development and evaluation of clinical treatments.Health services researchers come from a variety of specializations, including geography, nursing, economics, political science, epidemiology, public health, medicine, biostatistics, operations, management, engineering, pharmacy, psychology, usability and user experience design.While health services research is grounded in theory, its underlying aim is to perform research that can be applied by physicians, nurses, health managers and administrators, and other people who make decisions or deliver care in the health care system.