We used RNA microarrays (provided by Kangcheng Company) to screen related target microRNAs of lncRNA-APOC1P1-3 in breast cancer tissues, and predicted microRNAs in multiple databases like PITA, MIRDB4.0 and Miranda, by matching between sequences (Additional file 1: Table S2). The gene discussed is APOC1P1; the disease is breast carcinoma.