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In 1879 he began receiving hydrotherapy treatments at a spa near Meudon intended to improve what he believed was a circulatory problem , but in reality he was suffering from locomotor ataxia , a known side-effect of syphilis .
 Meudon, locomotor ataxia, syphilis
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Meudon, locomotor ataxia, syphilis