This item requires a subscription to Journal of Endocrinology. 
                        
                  
                 
             
            
            To view this item, select one of the options below:
            
            
            
            
            
               
               Sign up to journal email newsletters containing the latest news and content. When you submit your details you will receive
                  an email where you can confirm which journal newsletters you would like to receive. If you do not receive this email, please
                  check your junk mail.
               
               
             
          
         
            
               
                  
                  
                     
                        - 
                           
                              	    
                                 Published online before print
                                 August 13, 2014,
                                 doi:
                                 10.1530/JOE-14-0016
                                    
                                 
                              
                                 	    
                                    J Endocrinol
                                    November 1, 2014 
                                    
                                 	    
                                    223 
                                    
                                    133-142