Brooksville, FL-based Crescent Clinic is a no-pay primary care medical facility staffed by volunteers, mainly Muslim doctors who want to pay back the community that has nurtured their careers. Since its opening in the summer, the clinic has been seen close to 1,000 patients, including some 50 on a recent Saturday, said medical chief of staff Husan Abuzarad. The doctors now hope to expand hours to help meet the high demand.