tokens: The age dependence of morphologic risk factors appears to explain the high local failure rate seen in patients younger than 40 .
folded_tokens: the age dependence of morphologic risk factors appears to explain the high local failure rate seen in patients younger than 40 .
labels: O O O O B-other_name I-other_name I-other_name O O O O O O O O O O B-multi_cell O O O O