The team at the pediatric cardiology and critical care department at Hanover medical school in Germany, including Franziska Diekmann, Ekaterina Legchenko, Philippe Chouvarine, Ralf Lichtinghagen, Harald Bertram, Christoph M. Happel, and Georg Hansmann, recently published a study investigating the role of circulating Interleukin-7(IL-7) and its inverse correlation with the Pulmonary arterial hypertension (PAH) in humans….