3734
Hairbulb tyrosinase activity and glutathione content , as well as urine cysteinyldopa excretion , were low in PWS individuals with and without hypopigmentation and did not separate these two groups .
 PWS, hypopigmentation
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 PWS, hypopigmentation