+---------------SUBJ:V-N---------------+    
      +----------COMP:N-N(in)---------+      |    
      +COMP:N-N(of)+         +MOD_ATT:+      |    
      |            |         |        |      |    
 Expression of IGF 1 in mononuclear cells occurs .
COMP:N-N(of) (expression,1)
COMP:N-N(in) (expression,cell)
MOD_ATT:N-ADJ (cell,mononuclear)
SUBJ:V-N (occur,expression)