NPPB and sickle cell disease: NT‐proBNP is an important biomarker and predictor of cardiac morbidity and mortality and has further been considered to play a prognostic role in various non‐cardiologic diseases such as diabetes mellitus, severe septicemia, amyloidosis, and in certain hematologic diseases, like sickle cell disease or non‐Hodgkin lymphoma (NHL).12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23