Krogh, C.; Gortz, S.; Wohlfahrt, J.; Biggar, R. J.; Melbye, M.; Fischer, T. K. «Pre- and Perinatal Risk Factors for Pyloric Stenosis and Their Influence on the Male Predominance». American Journal of Epidemiology, 176, 1, 2012, pàg. 24–31. DOI: 10.1093/aje/kwr493. ISSN: 0002-9262.
Krogh, C.; Gortz, S.; Wohlfahrt, J.; Biggar, R. J.; Melbye, M.; Fischer, T. K. «Pre- and Perinatal Risk Factors for Pyloric Stenosis and Their Influence on the Male Predominance». American Journal of Epidemiology, 176, 1, 2012, pàg. 24–31. DOI: 10.1093/aje/kwr493. ISSN: 0002-9262.