oncogrid: check if data_category is null before adding data to the donor_track
oncogrid: check if data_category is null before adding data to the donor_track

isb-cgc/ISB-CGC-Webapp,isb-cgc/ISB-CGC-Webapp,isb-cgc/ISB-CGC-Webapp,isb-cgc/ISB-CGC-Webapp