Response by Hoeper et al to Letter Regarding Article, "Randomized, Multicenter Study to Assess the Effects of Different Doses of Sildenafil on Mortality in Adults with Pulmonary Arterial Hypertension"

Affiliations

• ¹ Department of Respiratory Medicine and Infectious Diseases, Hannover Medical School; and German Center for Lung Research (DZL), Biomedical Research in Endstage and Obstructive Lung Disease Hanover (BREATH), Hannover, Germany (M.M.H.).
• ² Viatris Inc, Kent, UK (S. Haughie).
• ³ Canonsburg, PA (T.H., S. Hackley).
• ⁴ MEDA Pharma GmbH & Co KG, Hessen, Germany (S.V.).