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Postgraduate Medical Journal|May 1, 1990
Type I protein S deficiency and skin necrosisA Craig, D A Taberner, A H Fisher, et al.
Gastrointestinal Endoscopy|December 15, 2000
1999 ASGE endoscopic ultrasound survey. ASGE Ad Hoc Endoscopic Ultrasound CommitteeT J Savides, A H Fisher, F G Gress, et al.
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