PT - JOURNAL ARTICLE AU - Erika B. Rosenzweig AU - Steven H. Abman AU - Rolf M.F. Berger TI - Response: Still puzzling about a clear definition of pulmonary arterial hypertension in newborns AID - 10.1183/13993003.00135-2019 DP - 2019 Mar 01 TA - European Respiratory Journal PG - 1900135 VI - 53 IP - 3 4099 - http://erj.ersjournals.com/content/53/3/1900135.short 4100 - http://erj.ersjournals.com/content/53/3/1900135.full SO - Eur Respir J2019 Mar 01; 53