Description  Claims  Cited references 

US6552067B   [0003] 
US6586468B   [0004] 
WO2006004191A   [0004] 
US7427685B   [0175] 
US4256108A   [0187] 
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US4265874A   [0187] 

The Journal of Clinical Investigation   [0005] 
Pharmaceutical Salts   [0029] 
Remington's Pharmaceutical Sciences   [0187]