23731
A preclinical viewpoint is also offered , as are analytical considerations and a regulatory perspective summarizing a pathway toward biomarker qualification . Clinical Pharmacology & Therapeutics ( 2013 ) ; advance online publication 8 May 2013 . doi : 10 . 1038 / clpt . 2013 . 57 .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None