AUTHOR=Bhavanam Naga P. , Failla Athena , Cho Young , Lockey Richard F. , Kolliputi Narasaiah TITLE=Commentary: The sphingosine kinase 1/sphingosine-1-phosphate pathway in pulmonary arterial hypertension JOURNAL=Frontiers in Pharmacology VOLUME=6 YEAR=2015 URL=https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2015.00229 DOI=10.3389/fphar.2015.00229 ISSN=1663-9812