GREENEVILLE — For more than four years, a Morristown physician and his wife perpetuated a scheme where dozens of patients would come through the doors of their pain clinic, spend minimal time with them and then receive a prescription for opioids. On Wednesday, the couple — Dr. Abdelrahman Mohamed, 64, and Cecilia Manacsa, 59 — were sentenced to 36 months and 16 months in federal prison respectively.