DOI:
10.1055/s-00000089
Ultraschall in der Medizin - European Journal of Ultrasound
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References
Ell C, Rabenstein T, Ruppert T. et al.
20 years of endoscopic papillotomy. Analysis of 2752 patients at Erlangen Hospital.
Dtsch Med Wochenschr 1995; 120: 163-167
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