For patients in subgroup 1 , 1 cells/microL < CD4 + T cell counts < or = 100 cells/microL ; For patients in subgroup 2 , 101 cells/microL < CD4 + T cell counts < or = 200 cells/lL ; For patients in subgroup 3 , 201 cells/microL < CD4 + T cell counts < or = 350 cells/microL .