12305
In vivo studies were also performed using blood from two patients with acne and three patients with psoriasis vulgaris treated with isotretinoin in monotherapy ( 8 or 20mg / day ) or combined with NBUVB ( 20mg isotretinoin / day + NBUVB ) .
 isotretinoin, isotretinoin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 isotretinoin, isotretinoin