[1] Hop Robert Debre, Dept Radiol, F-75935 Paris 19, France
[2] Hop Robert Debre, Dept Neonatol, F-75019 Paris, France
[3] Hop Robert Debre, Dept Gastroenterol, F-75019 Paris, France
[4] Hop Robert Debre, Ctr Invest Clin, F-75019 Paris, France
[5] Univ Louvain, Dept Pediat, Louvain, Belgium