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Hasna Ayadi, 25, and her sister Olfa Ayadi, 30, outside Dr. Meriem Achour's consulting room at Aziza Othmana Hospital. Olfa suffers from sickle cell disease. The condition has a wide range of health impacts and both of Olfa's hips are damaged and painful and she is hoping to have a bilateral replacement soon. In the meantime, she is underweight and struggling with an addiction to her pain medication. Hasna has had to quit her job to care for her sister and their younger brother, who also has sickle cell disease, compounding the family's financial troubles.