1. 
   kidd blood-group system
   A group of antigens consisting principally of jk(a) and jk(b), determined by allelic genes. Amorphs are encountered. Antibodies of these substances are usually weak and quite labile, stimulated by erythrocytes. ... (12 Dec 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?kidd+blood-group+system
   
   
2. 
   Kidd blood-group system
   (from the article `blood group`) Other blood groups were identified later, such as Kell, Diego, Lutheran, Duffy, and Kidd. The remaining blood group systems were first described ...
   Found op http://www.britannica.com/eb/a-z/k/29
   
   

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