DOI: 10.1055/s-00000089

Ultraschall in der Medizin - European Journal of Ultrasound

References

Chew SS, Yang JL, Newstead GL. et al
Anal fistula: Levovist-enhanced endoanal ultrasound: a pilot study. 
Dis Colon Rectum 2003; 46: 377-384  

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