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Most of the other low testosterone levels seemed to result from nonorganic hypothalamic dysfunction because of normal serum luteinizing hormone and prolactin and to have only a small role in erectile dysfunction ( definite improvement in only 16 of 44 [ 36 % ] after androgen therapy , normal morning or nocturnal erections in 30 % and definite vasculogenic contributions in 42 % ) .
 testosterone, hypothalamic dysfunction, erectile dysfunction
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 testosterone, hypothalamic dysfunction, erectile dysfunction