Patients hoping to enroll for treatment in cutting-edge research studies at the National Institutes of Health's renowned hospital will have to seek care elsewhere during the government shutdown. Each week that a shutdown lasts would force the agency's research-only hospital to turn away an estimated 200 patients, 30 of them children, seeking to participate in studies of experimental treatments, NIH Director Dr. Francis Collins told The Associated Press on Tuesday. Collins said the only exception he can make is for a child with a life-threatening illness. But patients already enrolled in studies under way at the NIH Clinical Center will continue to receive care.