A Message from Dr. Body
This (Gago-Diaz 2016) is a study we performed in collaboration with a large group of Spanish Investigators who are part of the Spanish Congenital Heart Disease Network. As an aside, collaborations are key in all medical research. There is real value in combining patients from many sources to increase the number of people in a study and to increase the power of the study to identify correct results. In addition, the intellectual contribution of all the Investigators improves the quality of the study many-fold.