Twins, once conjoined at spine and hip, learn to walk for the first time
The Story of the Surgery that Made Ben Carson Famous - and its Complicated Aftermath
Johns Hopkins Magazine
Ben Carson's surgeries separated twins, didn't always save them - The Boston Globe
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Conjoined twins (WARNING: GRAPHIC IMAGES)
How Democratic-Leaning Detroit Helped Shape Ben Carson's Conservative Views : It's All Politics : NPR
Twins conjoined at the head successfully separated after 55 hours of surgery - ABC News
Ben Carson's surgeries separated twins, didn't always save them - The Boston Globe