PTP4A2 and pulmonary arterial hypertension: After FDR correction for multiple testing, three intronic long noncoding RNAs (RP4–751H13.6/ATP6V0E2-AS1, RP4–534N18.4/AL136115.3/Lnc-PTP4A2–13, RP11–701H24.5/lnc-SNRPN-1:6) were associated with survival in all the patients with PAH analyzed and cutoffs distinguished high- and low-risk patient subgroups (Table E6 and Figure E4).