South Korean Siamese twins who were successfully separated in an operation in Singapore last month have been discharged from hospital. In a statement Monday, a Raffles Hospital spokesman said that the 5-month-old sisters, Ji Hye and Sa Rang, are both healthy and that the doctors are satisfied with the results. The sisters will periodically visit the hospital for treatment until they return to South Korea. The twins, who were joined at the tail bone at a slight angle, were successfully separated late last month.