How can I make multi-line, vertically and horizontally aligned labels for radio buttons in HTML Forms with CSS?

Question

Assuming the following markup:

    
Radio Buttons
    

        

            

        

Answer 1

Using the following markup and css I was able to produce multi-line labels that do not wrap under the radio button:

  

    

      
      
        stuff

        stuff1
      
    
    

      
      
        stuff

        stuff1
      
    
  

however I was unable to use:

fieldset label {
  vertical-align: middle;
}

to center the label vertically on the radio button, even when applying a width (both suggestions in Dmitri Farkov's answer. My main purpose was to prevent wrapping under the radio button, so this solution will be fine for the time being.