I am currently trying to use sBLUP following the instruction from this post:link. It seems that I have to input summary statistics in GCTA-COJO format (SNP,A1,A2,freq,b,se,p,N). However, the summary statistics that I used doesn't have "freq" data. I understand GCTA will need freq data to exclude SNPs that have large difference of allele frequency among the GWAS summary data and the reference sample. Under this case, what should I do to continue analyses?