The document appears to be a PDF file, possibly containing a scientific article published in Nature. However, the content is not accessible in a readable format, as it primarily consists of PDF metadata and encoding information. Therefore, it cannot be summarized meaningfully without further context or readable content.
    
    
    
    
        
        
            
            
        
    
    
        
    
    
        
    
    
    
    
    
        
            
            
                
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