COLUMBUS, Ohio (AP) -- Doctors at a central Ohio hospital have separated conjoined twin girls in a 16-hour operation. A statement released by a public relations firm says the 11-month-old girls were recovering after the complex procedure last Thursday at Nationwide Children's Hospital in Columbus. The surgical team included more than 30 people and was led by Dr. Gail Besner, the hospital's chief of pediatric surgery. According to the hospital, Acen and Apio were connected at the hip and pelvic region. Doctors delicately separated their spines, muscles and tissues -- and plastic surgery covered the areas where they were conjoined. The statement says the girls' family is from Uganda and had traveled to the hospital in December. Experts say conjoined twins occur once in about every 200,000 pregnancies. Video:Nationwide Children's Hospital Columbus, OH/CNN Newsource Follow us on Twitter @Local12 and LIKE us on Facebook for updates!