Objectives: To explore the incidence, etiologies, diagnostic methods, treatment options and outcomes in neonates with persistent pulmonary hypertension of the newborn PPHN and to identify mortality risk factors in a study from six Asian countries.Methods: A retrospective chart review of patients with documented PPHN from seven centers in six Asian countries Japan, Kuwait, India, Pakistan, Singapore, and Thailand between 1 January, 2014 and 31 December, 2016, was performed.Results: A total of 369 PPHN infants were identified. ...