Making header border lines invisible/white in selective columns with PROC REPORT

[smackerz1988]

Hello,

I'm creating an output that requires this header layout 

I'm using this code 

proc report data=final out=view missing nowindows split="*" contents=" ";
   column pag ("MedDRA System Organ Class /* Preferred Term" (" " aesoc))    
    ("trt (N=&trt_count.)" ("arm1*(N=&arm1_count.)" ('Subjects with TEAE*n (%)' arm1))
    ("arm2*(N=&arm2_count.)" ('Subjects with TEAE*n (%)' arm2)))
    ord;
   define pag / order  order = internal noprint ;
   define aesoc  / display " " left flow style(header)=[just=l] STYLE(column)=[&col_style asis=on cellwidth=12.00cm];
   define ord / order order =  internal noprint;   
   define arm2 / " " display   center flow STYLE(column)=[&col_style cellwidth=7.00cm];
   define arm1 / " " display center   flow STYLE(column)=[&col_style cellwidth=7.00cm];
   

    compute after pag / style ={&line_small};
        line "";
    endcomp;

    break after pag / page;

compute before _page_ / left style={&tit_style};
   line "Table 1.4.3 Severe treatment-emergent adverse events by System Organ Class and Preferred Term with incidence of >=5% in at least one arm - Separately by TPC regimen - Safety Analysis Set";   
endcomp;

	compute before ord / style ={&line_small};
		line "";		
	endcomp;

 compute after _page_ / left style={&foot_style};
   line "Notes: NE: Not evaluable; SOC: System Organ Class; PT: Preferred Term; TEAE: Treatment-emergent adverse event. Adverse events were coded using the MedDRA dictionary, Version 26.1 and graded according to NCI CTCAE v5.0.";   
endcomp;
run;

However this is my ouput 

How am I able to make this border line for this column either not visibly or removed?

[Ksharp]

Did you try :
("MedDRA System Organ Class /* Preferred Term" (" " aesoc))
-->
( "09"x ("MedDRA System Organ Class /* Preferred Term" ("09"x aesoc)) )

[smackerz1988]

Thanks for the suggestion. yeah I tried this but no luck unfortunately