1954
Thus , X - linked retinoschisis is caused by abnormalities in a putative secreted photoreceptor protein and is the first example of a secreted photo - receptor protein associated with a retinal dystrophy . .
 X - linked retinoschisis, retinal dystrophy
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease 
Text: {0} 
Answer:
 X - linked retinoschisis, retinal dystrophy