References
- Marienfeld CJ, Telles N, Silvera J, et al. A 20-year follow-up study of “innocent” murmurs. Pediatrics 1962: 30(Jul): 42–8
- Feldt RH. Avasthey P. Yoshimasu F, et al. Incidence of congenital heart disease in children born to residents of Olmsted County. Minnesota. 1950–1969. Mayo Clin Proc 1971: 46(12): 794–9
- Roberts WC. Anatomically isolated aortic valvular disease: the case against its being of rheumatic etiology. Am J Med 1970: 49(2): 151–9
- Andersen M. Moller I, Lyngborg K. et al. The natural history of small atrial septal defects: long-term follow-up with serial heart catheterizations. Am Heart J 1976: 92(3): 302–7
- Kulangara RJ, Strong WB, Miller MD. Differential diagnosis of heart murmurs in children. Postgrad Med 1982: 72(2): 219–28