1. Alpert BS, Kartodihardjo W, Harp P, et al: Exercise blood pressure response— a predictor of severity of aortic stenosis in children. J Pediatr 98: 763–765, 1981.
2. American Academy of Pediatrics Policy Statement: Cardiac evaluation for participation in sports. American Academy of Pediatrics, Evanston 111., 1977.
3. Bastanier C, Kaltwasser B, Mocellin R: Postoperative Belastungsuntersuchungen bei Kindern und Jugendlichen mit valvularer Pulmonalstenose. Z Kardiol 66: 587–593, 1977.
4. Bay G, Abrahamsen AM, Muller C: Left-to-right shunt in atrial septal defect at rest and during exercise. Acta Med Scand 190: 205–209, 1971.
5. Berenson GS, Voors AW, Webber LS, et al: Racial differences of parameters associated with blood pressure levels in children. The Bogalusa heart study. Metabiologica 28: 1218–1228, 1979.