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Deficiency of glucose - 6 - phosphate dehydrogenase ( G6PD ) is usually found at high frequencies in areas of the world where malaria has been endemic .
 Deficiency of glucose - 6 - phosphate dehydrogenase, malaria
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 Deficiency of glucose - 6 - phosphate dehydrogenase, malaria