Temporarily switching from oral to intravenous selexipag in patients with pulmonary arterial hypertension: safety, tolerability, and pharmacokinetic results from an open-label, pha... oleh Hans Klose, Kelly M. Chin, Ralf Ewert, Henning Gall, Joseph Parambil, David Poch, Hans-Jürgen Seyfarth, Lene N. Axelsen, Shu-Fang Hsu Schmitz, Claudia Stein, Ioana R. Preston