@article{ref1, author = "F. Lacour-Gayet", title = "Risk stratification theme for congenital heart surgery", year = 2002, journal = "Seminars in Thoracic & Cardiovascular Surgery: Pediatric Cardiac Surgery Annual", publisher = "Elsevier", volume = 5, number = 1, pages = "148-152", month = "Jan", doi = "10.1053/pcsu.2002.31502", url = "http://dx.doi.org/10.1053/pcsu.2002.31502" }