Identification of novel type VII collagen gene mutations resulting in severe recessive dystrophic epidermolysis bullosa .
O O O O B-GeneOrGeneProduct I-GeneOrGeneProduct O O O O O B-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature O