You will be shown an abstract from a biomedical research paper. Given this abstract, your task is to extract all unique entities of the following types: ["HealthCareActivity", "InjuryOrPoisoning", "BodySubstance", "IntellectualProduct", "AnatomicalStructure", "SpatialConcept", "Chemical", "Bacterium", "MedicalDevice", "Organization", "BiomedicalOccupationOrDiscipline", "Finding", "BiologicFunction", "Virus", "ResearchActivity", "ClinicalAttribute", "PopulationGroup", "Eukaryote", "BodySystem", "Food", "ProfessionalOrOccupationalGroup"].

Please return the output as a JSON object of the format: {"Virus": ["HIV", ...], "Bacterium": ["MRSA", ...], "AnatomicalStructure": ["Lung", ...], "BodySystem": ["CNS", ...], "BodySubstance": ["Serum", ...], "Finding": ["Headache", ...], "InjuryOrPoisoning": ["Fracture", ...], "BiologicFunction": ["Death", ...], "HealthCareActivity": ["Biopsy", ...], "ResearchActivity": ["Clinical trial", ...], "MedicalDevice": ["Lenses", ...], "SpatialConcept": ["Camps", ...], "BiomedicalOccupationOrDiscipline": ["Forensic medicine", ...], "Organization": ["WHO", ...], "ProfessionalOrOccupationalGroup": ["Provider", ...], "PopulationGroup": ["Swimmers", ...], "Chemical": ["Gold", ...], "Food": ["Rice", ...], "IntellectualProduct": ["RPAM", ...], "ClinicalAttribute": ["Biomarker", ...], "Eukaryote": ["Dogs", ...]}. The keys should be entity types and values should be lists of extracted entities belonging to the corresponding type. If you cannot find entities belonging to a specific type, the value should be [].

Only output the JSON object and do not include any additional text.

Abstract:

Outcomes of chest wall resections in pediatric sarcoma patients Chest wall tumors in pediatric patients are rare. This study evaluates outcomes in pediatric patients who have undergone chest wall resections secondary to sarcomas. A retrospective review was performed for patients <19years old who underwent chest wall resections for sarcoma 1999-2014 at the University of Texas MD Anderson Cancer Center. Of 44 patients, Ewing's sarcoma (n=18) and osteosarcoma (n=16) were most common. Other sarcomas included synovial sarcoma, chondrosarcoma, and rhabdomyosarcoma. Gore-Tex ® or a Marlex™ mesh and methyl methacrylate sandwich was used in 22 patients, and 9 children did not require reconstruction. Twenty-four (54.5%) patients had normal activity, 3 (6.8%) had occasional discomfort, 2 (4.5%) had pain impairing function, 7 (15.9%) required medication or physical therapy for impairment, and 8 (18.2%) needed additional surgery. Five children (11.4%) developed scoliosis, and all of these patients had posterior rib tumors. Median overall survival for the entire cohort was 41.9±11.82 months. Histology (p=0.003), location of tumor on the ribs (p=0.007), and surgical margins (p=0.011) were significantly associated with overall survival. Tumors on the middle and posterior (p=0.003) portions of the ribs had a lower chance of death. Scoliosis is more common in posterior rib resections. Histology, location of the tumor, and surgical margins impact survival, but, type of reconstruction does not. III. Treatment Study.
{"AnatomicalStructure": ["surgical margins", "Scoliosis", "ribs", "scoliosis"], "Bacterium": [], "BiologicFunction": ["death", "osteosarcoma", "Tumors", "Chest wall tumors", "synovial sarcoma", "tumor", "sarcomas", "pain impairing function", "Ewing\u0027s sarcoma", "impairment", "rhabdomyosarcoma", "rib tumors", "chondrosarcoma", "sarcoma"], "BiomedicalOccupationOrDiscipline": ["Histology", "surgery"], "BodySubstance": [], "BodySystem": [], "Chemical": ["methyl methacrylate sandwich", "Marlex\u2122 mesh", "medication", "Gore-Tex"], "ClinicalAttribute": [], "Eukaryote": [], "Finding": ["occasional discomfort"], "Food": [], "HealthCareActivity": ["physical therapy", "rib resections", "chest wall resections"], "InjuryOrPoisoning": [], "IntellectualProduct": [], "MedicalDevice": [], "Organization": ["University of Texas MD Anderson Cancer Center"], "PopulationGroup": ["entire cohort"], "ProfessionalOrOccupationalGroup": [], "ResearchActivity": ["study", "retrospective review", "Treatment Study"], "SpatialConcept": ["location", "posterior"], "Virus": []}