10861
It was not until 1980 and the work of Theodore Millon that led to splitting this concept into three personality disorders ( now schizoid , schizotypal and avoidant ) .
 Theodore Millon
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Theodore Millon