19467
Single - center crossover studies were conducted , each in <= 24 healthy subjects , to compare the pharmacokinetics of a single 5 - mg oral dose of modified - release prednisone and conventional prednisone , as well as the effect of food on bioavailability .
 Chemical: prednisone; Chemical: prednisone
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: prednisone; Chemical: prednisone