CR, complete response; ISS, International Staging System; NE, not evaluable; PD, progressive disease; SD, stable disease; VGPR, very good partial response. *Excluded were three patients not evaluable
NOTE:* Education was ordinally measured with 1 = Compulsory schooling not completed (less than 9 years of school) or special school; 2 = Completed compulsory schooling (9–10 years of school); 3 = C
