3338
Improvements were seen in the number of tender joints , the severity of swelling and tenderness , the time of walk 50 feet , the duration of morning stiffness and the circumference of the left knee .
 tender joints, swelling, tenderness, morning stiffness
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 tender joints, swelling, tenderness, morning stiffness