1. In preparation;Barlow, J.; Kincaid-Smith, P.,1959
2. Bramwell, C. (1935). Quart. J. Med., N.S. 4, 149.
3. Charcelay (1837). Arch. Gdn. Mid., Paris, 3rd ser., 3, 393.
4. Duchosal, P. (1932). Amer. Heart J., 7, 613.
5. Duchosal, P. (1935). Arch. Mal Caur, 28, 345.